Yeah, in their photo gallery ( https://www.facebook.com/marathonmanuk/photos/?tab=album&album_id=1033074693443455 ) he's regularly seen alternating between a white (with red trim) and black (with blue/green trim) TomTom watch. It would be relatively straightforward (but time-consuming) to associate each photo with a TomTom-screenshot segment, if it comes to the point that doing such an exercise would reduce the time-zone confusion in linking TomTom screenshots to Strava activities.
For the record, I did not notice anyone else in the photos wearing one of the TomTom watches.
I suppose this is fruitless but we were able to get EXIF headers out of the blog photos, but the ones on Facebook have been stripped. Are these posted anywhere else that we know of? I'll bet we would find that many of these photos were taken during slow sections of some unbelievable runs and might be sandwiched between button hooks.