Found this because the article mentioned Liam -- Peter Capaldi, who is being interviewed, played Robbie Ross in Judas Kiss -- but I thought the Ewan angle deserved attention:

And what can you tell us about your upcoming film collaboration with Ewan McGregor?
Yes, hopefully thats next year. Its one of those things thats not going to happen until the moneys there. Its set in the 1930s, and its a comedy. Ewans very funny, and this offers him a part in which he can stretch his comic muscles. Were not quite there yet. Its looking pretty good, but these things can always collapse at the last moment. I wrote the script and will direct. Its one of those projects Ive been working on for years its my baby. Ewans come along and been absolutely fantastic. Hes been hugely committed to it, but its an offbeat thing. Its really more like four different films in one.