Looking at Real Time Trains, there don't appear to have been as many SWR cancellations on Friday 6th as on Thursday 5th but there are some Southern cancellations showing at Portsmouth & Southsea on the Friday, some of them saying due to a problem at the depot (I didn't think Southern used Fratton depot, but maybe some Southern EMUs are stabled there overnight?) and on Saturday 7th some SWR trains are shown as cancelled "due to an issue with the train crew".Looks like SWR are cancelling the same trains as yesterday, any idea why all the 10 and 12 car services aren’t being split down to provide more services?
The BBC is reporting that SWR ran a reduced service on the Saturday on the Portsmouth and Weymouth lines and cancelled all trains between Reading and Salisbury because of staff Covid absences and the impact of the Fratton derailment. This meant that Overton, Whitchurch and Grateley stations had no service. Exeter-Waterloo trains are also showing on Real Time Trains as not running east of Basingstoke.
I am guessing that unit 444 008 could be out of service for a while.