I understand your disappointment of not being able to find players for such a nice card game. I was in the same situation in the end of 2008. With the help of only ONE another player which I met online on the French board 'Le Cénacle', we set-up a 'gathering of Cthulhu and Lovecraft fans' evening at the local club and communicated online for about three weeks on the Cenacle and the local boardgames club forum. It was an unexpected surprise as we were 11 people that evening, with one curious beginner (who is now an experienced and regular player) and a bunch of former young cultists who were experienced players of the CCG format! And from there, the rest is history : after an organized play event in the following Summer, we had a quite active community of 8-10 players, plus some semi-regular players! An now, a couple of years later, our annual tourney is hosting the European Champ!
It's a long shot but have you seen there is a thread about an unspeakable Cthulhu week-end in Liege, Belgium coming this next week-edn!? If you are located near London, attending Liege event is even closer than going somewhere in North of United Kingdom. At least 25 people have confirmed!The local Belgian community is very welcoming.
Furthermore, the CoC events are hosted within a quite important gaming convention. There are regular players coming from abroad, and even a couple of British gentlemen who are mostly attending for some years now to play the 18XX train games.
I am aware of Liege, sadly cost time and life in general are prohibiting me form going, perhaps next year?
Having been a part of various ccg/rpg etc scenes over the years I know that with two or three like-minded persons, in the right place, can create a decent games group.
The challenge is finding people, especially when we (in the UK at least) automatically assume there's no one out there playing! Something of a 'catch-22'.