I know exactly what the problem was
The door unlocking system wasn't working properly despite repeated re-coupling attempts (the problem was with the 143 apparently) and after the 07:52 left, the 143+150 left Westbury empty, not sure where it went after that. I have seen 143s couple properly before, so I'm not sure what happened today.
Someone obviously didn't know the kicking the door trick,
which usually sorts out any problems with brakes being applied inadvertantly on 143's.
As I didn't have time this morning to look at the departure board at Trowbridge it wasn't clear whether the 07.44 had been cancelled or not, it's usually a neat idea if it shows 'delayed' and the first arrival then gets jammed, to wait for the following which is then empty, just a few mins late that's all. There were plenty at Bradford who chose not to board knowing that they would get a nice journey to work. (Ok if you are flexible)
Would hate to think what would have happened if there had been a problem in Fratton and it had turned up as a 2 car.
, 18 months ago this scenario was a regular occurence leading to zero space after Bradford, so I have every sympathy with passengers at Bath/Oldfield/Keynsham who at the time were regularly watching 2 car trains passing them already full from Trowbridge, if TonyA hadn't done something then someone else would have.