Then again, 2 car 165s have also escaped onto the Weymouths...
And regularly do so on Portsmouths, although thankfully not as booked.
3 carriage Turbos, however,
are booked - so I can see the route being a lottery of 3-165 and 166s when the rest are displaced. At least, for now, I have the 1330/1430 off of Cardiff and return for my monthly Uni commute, as these are booked 4-158.
Weymouth has indeed become largely 2x 2-165, which is not pleasant at all, but then this was a common route for the 150/1s.