On the Portsmouth direct, normal 3tph (2 fast, 1 stopper) has been cut to 2tph (1 of each) for the foreseeable future. (IIRC when SWR took over, they promised 4tph, but if so it never happened).
Travelling by train is a pretty miserable experience at the moment - not just the service cuts but masks, the hectoring tone, being ordered around like a recalcitrant 6 year old - you must wear masks at all times, keep left, don't sit there, no there's no catering etc. The roads are quiet, much nicer to go by car instead!