In recent years there has been a period of recess in the UK parliament to allow for party conferences. This year however parliament was prorogued and while this action was ultimately overturned it did mean that the main opposition party held its conference while parliament was not sitting.
This has led to an unusual situation where the all the opposition parties MPs are able to be in Parliament while the MPs for the Government (Conservative party) are likely to not be in attendance in great (any?) number.
Given this situation my question is a follows.
In the event a motion was tabled and a vote required does there need to be a minimum number of MPs from the party currently "in power" for this to take place? More generally speaking is there a minimum number required for anything that takes place within parliament? or could 1 person technically do everything?