After a request from Film 4 I have changed the OnFilm4 logo to make it less like the official Film 4 logo so people do not think it is an official service of Channel 4. As they asked so nicely and have a good reason I have no issue with doing this. Hopefully it retains the essence of Film 4 without being confused with the official logo.
If only other organisations (I have two in mind) would write polite emails instead of threatening ones with sudo legal bull they might have got what they want as well. There might have been a little rant sneak in there. Sorry about that.