diff --git a/packages/node_modules/@node-red/editor-client/src/js/nodes.js b/packages/node_modules/@node-red/editor-client/src/js/nodes.js
index 6dd500581..adbf86741 100644
--- a/packages/node_modules/@node-red/editor-client/src/js/nodes.js
+++ b/packages/node_modules/@node-red/editor-client/src/js/nodes.js
@@ -63,6 +63,7 @@ RED.nodes = (function() {
             defaults: {
                 label: {value:""},
                 disabled: {value: false},
+                locked: {value: false},
                 info: {value: ""},
                 env: {value: []}
             }
@@ -1052,6 +1053,9 @@ RED.nodes = (function() {
         node.type = n.type;
         for (var d in n._def.defaults) {
             if (n._def.defaults.hasOwnProperty(d)) {
+                if (d === 'locked' && !n.locked) {
+                    continue
+                }
                 node[d] = n[d];
             }
         }
diff --git a/packages/node_modules/@node-red/editor-client/src/js/ui/editor.js b/packages/node_modules/@node-red/editor-client/src/js/ui/editor.js
index fb4c200f5..0a644ba42 100644
--- a/packages/node_modules/@node-red/editor-client/src/js/ui/editor.js
+++ b/packages/node_modules/@node-red/editor-client/src/js/ui/editor.js
@@ -1852,6 +1852,16 @@ RED.editor = (function() {
                             }
                         }
 
+                        var locked = $("#node-input-locked").prop("checked");
+                        if (workspace.locked !== locked) {
+                            editState.changes.locked = workspace.locked;
+                            editState.changed = true;
+                            workspace.locked = locked;
+                            $("#red-ui-tab-"+(workspace.id.replace(".","-"))).toggleClass('red-ui-workspace-locked',!!workspace.locked);
+                            // if (workspace.id === RED.workspaces.active()) {
+                            //     $("#red-ui-workspace").toggleClass("red-ui-workspace-locked",!!workspace.locked);
+                            // }
+                        }
                         if (editState.changed) {
                             var historyEvent = {
                                 t: "edit",
@@ -1892,6 +1902,7 @@ RED.editor = (function() {
                 var trayBody = tray.find('.red-ui-tray-body');
                 trayBody.parent().css('overflow','hidden');
                 var trayFooterLeft = $('<div class="red-ui-tray-footer-left"></div>').appendTo(trayFooter)
+                var trayFooterRight = $('<div class="red-ui-tray-footer-right"></div>').appendTo(trayFooter)
 
                 var nodeEditPanes = [
                     'editor-tab-flow-properties',
@@ -1906,6 +1917,18 @@ RED.editor = (function() {
                     disabledIcon: "fa-ban",
                     invertState: true
                 })
+
+                if (!workspace.hasOwnProperty("locked")) {
+                    workspace.locked = false;
+                }
+                $('<input id="node-input-locked" type="checkbox">').prop("checked",workspace.locked).appendTo(trayFooterRight).toggleButton({
+                    enabledLabel: 'Unlocked',
+                    enabledIcon: "fa-unlock-alt",
+                    disabledLabel: 'Locked',
+                    disabledIcon: "fa-lock",
+                    invertState: true
+                })
+
                 prepareEditDialog(trayBody, nodeEditPanes, workspace, {}, "node-input", defaultTab, function(_activeEditPanes) {
                     activeEditPanes = _activeEditPanes;
                     trayBody.i18n();
diff --git a/packages/node_modules/@node-red/editor-client/src/js/ui/tab-info-outliner.js b/packages/node_modules/@node-red/editor-client/src/js/ui/tab-info-outliner.js
index 32491f297..20bf627f0 100644
--- a/packages/node_modules/@node-red/editor-client/src/js/ui/tab-info-outliner.js
+++ b/packages/node_modules/@node-red/editor-client/src/js/ui/tab-info-outliner.js
@@ -221,6 +221,22 @@ RED.sidebar.info.outliner = (function() {
         } else {
             $('<div class="red-ui-info-outline-item-control-spacer">').appendTo(controls)
         }
+        if (n.type === 'tab') {
+            var lockToggleButton = $('<button type="button" class="red-ui-info-outline-item-control-lock red-ui-button red-ui-button-small"><i class="fa fa-unlock-alt"></i><i class="fa fa-lock"></i></button>').appendTo(controls).on("click",function(evt) {
+                evt.preventDefault();
+                evt.stopPropagation();
+                if (n.locked) {
+                    RED.workspaces.unlock(n.id)
+                } else {
+                    RED.workspaces.lock(n.id)
+                }
+            })
+            RED.popover.tooltip(lockToggleButton,function() {
+                return RED._("common.label."+(n.locked?"unlock":"lock"));
+            });
+        } else {
+            $('<div class="red-ui-info-outline-item-control-spacer">').appendTo(controls)
+        }
         controls.find("button").on("dblclick", function(evt) {
             evt.preventDefault();
             evt.stopPropagation();
@@ -364,6 +380,8 @@ RED.sidebar.info.outliner = (function() {
         flowList.treeList.addChild(objects[ws.id])
         objects[ws.id].element.toggleClass("red-ui-info-outline-item-disabled", !!ws.disabled)
         objects[ws.id].treeList.container.toggleClass("red-ui-info-outline-item-disabled", !!ws.disabled)
+        objects[ws.id].element.toggleClass("red-ui-info-outline-item-locked", !!ws.locked)
+        // objects[ws.id].treeList.container.toggleClass("red-ui-info-outline-item-disabled", !!ws.disabled)
         updateSearch();
 
     }
@@ -378,6 +396,7 @@ RED.sidebar.info.outliner = (function() {
         existingObject.element.find(".red-ui-info-outline-item-label").text(label);
         existingObject.element.toggleClass("red-ui-info-outline-item-disabled", !!n.disabled)
         existingObject.treeList.container.toggleClass("red-ui-info-outline-item-disabled", !!n.disabled)
+        existingObject.element.toggleClass("red-ui-info-outline-item-locked", !!n.locked)
         updateSearch();
     }
     function onFlowsReorder(order) {
diff --git a/packages/node_modules/@node-red/editor-client/src/js/ui/workspaces.js b/packages/node_modules/@node-red/editor-client/src/js/ui/workspaces.js
index d274ba519..23171fb5a 100644
--- a/packages/node_modules/@node-red/editor-client/src/js/ui/workspaces.js
+++ b/packages/node_modules/@node-red/editor-client/src/js/ui/workspaces.js
@@ -58,6 +58,9 @@ RED.workspaces = (function() {
             if (!ws.closeable) {
                 ws.hideable = true;
             }
+            if (!ws.hasOwnProperty('locked')) {
+                ws.locked = false
+            }
             workspace_tabs.addTab(ws,targetIndex);
 
             var hiddenTabs = JSON.parse(RED.settings.getLocal("hiddenTabs")||"{}");
@@ -75,6 +78,7 @@ RED.workspaces = (function() {
                 type: "tab",
                 id: tabId,
                 disabled: false,
+                locked: false,
                 info: "",
                 label: RED._('workspace.defaultName',{number:workspaceIndex}),
                 env: [],
@@ -329,6 +333,12 @@ RED.workspaces = (function() {
                 if (tab.disabled) {
                     $("#red-ui-tab-"+(tab.id.replace(".","-"))).addClass('red-ui-workspace-disabled');
                 }
+                $('<span class="red-ui-workspace-locked-icon"><i class="fa fa-lock"></i> </span>').prependTo("#red-ui-tab-"+(tab.id.replace(".","-"))+" .red-ui-tab-label");
+                if (tab.locked) {
+                    $("#red-ui-tab-"+(tab.id.replace(".","-"))).addClass('red-ui-workspace-locked');
+                }
+
+
                 RED.menu.setDisabled("menu-item-workspace-delete",activeWorkspace === 0 || workspaceTabCount <= 1);
                 if (workspaceTabCount === 1) {
                     showWorkspace();
@@ -465,6 +475,8 @@ RED.workspaces = (function() {
         RED.actions.add("core:remove-flow",removeWorkspace);
         RED.actions.add("core:enable-flow",enableWorkspace);
         RED.actions.add("core:disable-flow",disableWorkspace);
+        RED.actions.add("core:lock-flow",lockWorkspace);
+        RED.actions.add("core:unlock-flow",unlockWorkspace);
         RED.actions.add("core:move-flow-to-start", function(id) { moveWorkspace(id, 'start') });
         RED.actions.add("core:move-flow-to-end", function(id) { moveWorkspace(id, 'end') });
 
@@ -638,6 +650,49 @@ RED.workspaces = (function() {
             }
         }
     }
+    function lockWorkspace(id) {
+        setWorkspaceLockState(id,true);
+    }
+    function unlockWorkspace(id) {
+        setWorkspaceLockState(id,false);
+    }
+    function setWorkspaceLockState(id,locked) {
+        var workspace = RED.nodes.workspace(id||activeWorkspace);
+        if (!workspace) {
+            return;
+        }
+        if (workspace.locked !== locked) {
+            var changes = { locked: workspace.locked };
+            workspace.locked = locked;
+            $("#red-ui-tab-"+(workspace.id.replace(".","-"))).toggleClass('red-ui-workspace-locked',!!workspace.locked);
+            if (!id || (id === activeWorkspace)) {
+                $("#red-ui-workspace").toggleClass("red-ui-workspace-locked",!!workspace.locked);
+            }
+            var historyEvent = {
+                t: "edit",
+                changes:changes,
+                node: workspace,
+                dirty: RED.nodes.dirty()
+            }
+            workspace.changed = true;
+            RED.history.push(historyEvent);
+            RED.events.emit("flows:change",workspace);
+            RED.nodes.dirty(true);
+            // RED.sidebar.config.refresh();
+            // var selection = RED.view.selection();
+            // if (!selection.nodes && !selection.links && workspace.id === activeWorkspace) {
+            //     RED.sidebar.info.refresh(workspace);
+            // }
+            // if (changes.hasOwnProperty('disabled')) {
+            //     RED.nodes.eachNode(function(n) {
+            //         if (n.z === workspace.id) {
+            //             n.dirty = true;
+            //         }
+            //     });
+            //     RED.view.redraw();
+            // }
+        }
+    }
 
     function removeWorkspace(ws) {
         if (!ws) {
@@ -793,6 +848,8 @@ RED.workspaces = (function() {
             workspace_tabs.resize();
         },
         enable: enableWorkspace,
-        disable: disableWorkspace
+        disable: disableWorkspace,
+        lock: lockWorkspace,
+        unlock: unlockWorkspace
     }
 })();
diff --git a/packages/node_modules/@node-red/editor-client/src/sass/tab-info.scss b/packages/node_modules/@node-red/editor-client/src/sass/tab-info.scss
index 57dc7d6e3..ed526b263 100644
--- a/packages/node_modules/@node-red/editor-client/src/sass/tab-info.scss
+++ b/packages/node_modules/@node-red/editor-client/src/sass/tab-info.scss
@@ -467,6 +467,9 @@ div.red-ui-info-table {
         .fa-eye {
             display: none;
         }
+        .fa-unlock-alt {
+            display: none;
+        }
     }
     .red-ui-info-outline-item-control-reveal,
     .red-ui-info-outline-item-control-action {
@@ -500,6 +503,17 @@ div.red-ui-info-table {
             display: none;
         }
     }
+    .fa-lock {
+        display: none;
+    }
+    .red-ui-info-outline-item.red-ui-info-outline-item-locked & {
+        .fa-lock {
+            display: inline-block;
+        }
+        .fa-unlock-alt {
+            display: none;
+        }
+    }
     button {
         margin-right: 3px
     }
diff --git a/packages/node_modules/@node-red/editor-client/src/sass/workspace.scss b/packages/node_modules/@node-red/editor-client/src/sass/workspace.scss
index 24e156b1e..c458d03d1 100644
--- a/packages/node_modules/@node-red/editor-client/src/sass/workspace.scss
+++ b/packages/node_modules/@node-red/editor-client/src/sass/workspace.scss
@@ -106,6 +106,28 @@
     }
 }
 
+.red-ui-workspace-locked-icon {
+    display: none;
+}
+.red-ui-workspace-locked {
+    &.red-ui-tab {
+        // border-top-style: dashed;
+        // border-left-style: dashed;
+        // border-right-style: dashed;
+
+        // a {
+        //     font-style: italic;
+        //     color: var(--red-ui-tab-text-color-disabled-inactive) !important;
+        // }
+        // &.active a {
+        //     font-weight: normal;
+        //     color: var(--red-ui-tab-text-color-disabled-active) !important;
+        // }
+        .red-ui-workspace-locked-icon {
+            display: inline;
+        }
+    }
+}
 
 #red-ui-navigator-canvas {
     position: absolute;