SOLVED - Tracking Empties Missing After Re-Opening Scene

As the title implies - I cannot see my tracking markers when I re-open a project. I can make them reappear by selecting ‘3D Markers to Mesh’ in the Solve panel but they come back as a single mesh of little cubes rather than individual empties like you normally get when you do a solve… Also I get a default UI layout rather than the VFX one that I selected for the project. Why does Blender switch?

‘Load UI’ was not set as a default and I was loading by right-clicking the Blender icon and selecting my project, which will use whatever your load settings are set to and mine did not take custom UI into account. Loaded Blender, hit ‘Ctrl’ + ‘O’, ticked the ‘Load UI’ box and loaded the file again. All is well.