I've just heard about this new sitcom created by the same people who created Peep Show. This new sitcom, Ladies and Gentlemen was aired last night after a recording of the new series of QI.
It was meantioned in the QI Talk blog that:
"After the recording tonight the audience were given the opportunity to stay in their seats and watch the first ever public screening of the new show from the 'Peep Show' writers and creators called 'Ladies and Gentlemen'. It was described as being a 'bit like Friends' but set in 1865 in olde London town!"
It looks like this is Modern Men, as mentioned in the Sitcoms in production section
(NB, for those of you worried about clicking on the QI link and finding QI spoilers, please not that the spoliers are written in WHITE text, and therefore can only be read by highlighting it.)