We are looking for Xbox One players and have members in UK, including myself.
I have to say our Xbox One side, is quite small at the moment. But we are working on growing it.
I know you said you are looking for a decent size clan, but I thought I would throw us out there, just in case.
We have 2 scheduled (from the 14th) Call of Duty:Ghosts events per week, that start at 9pm UK time.
We also take part in Clan Wars.
You need to be 18 years old or over to join.
We are called Clan n00b, with the clan tag n00b, we don't have a K/D limit.
Come take a look at our website at: http://www.clan-n00b.com/