Oddly, I've just received an e-mail from
SWR» containing:
On Monday 18 May, we introduced a new timetable to increase capacity and although this will remain a reduced service, some routes will see services reinstated for the first time since lockdown began, with other routes benefiting from longer trains with more carriages or some extra services at peak times.
It doesn't mention any more recent or future date!
Incidentally, this seems to be the first one I have ever had from them - I'm not even sure where they got my address from.