Only a minority of the programmes on UKTV channels are shown on their catchup service, UKTV Play. Birds of a Feather isn't one of them:
http://uktvplay.uktv.co.uk/shows/
For Methyl:
Bookmark this link and then (by clicking on the links in the right-hand column) you'll always be able to quickly see the number of the series and the episode for each programme that's coming up:
http://www.radiotimes.com/search?q=the%20bill&type=episodes
It only returned last year so this is the second of the new lot. Aside from that, it has been shown weekly since January the first, so today was the fifth I think...I have certainly seen more than three and I never watch on the day shown.
Given the way it work, there must be a repeat on 1 or 2....Not near telly so can't check now.