Channel 5 still uses the font Gotham everywhere in BB left over from their 2011 brand refresh
but like this is a minor detail and everything but I really hope they change it this year, when they try and use it, it looks tragic.
the current channel branding uses their own custom font (iirc) that was originally created for VH1 in the US. It'd look so much better on everything (like the BBBOTS title screen) and it looks amazing in the current trailers they're putting out
idk if they will though