I think there's a number of issues that make it a challenge . . .
Firstly, where do you go to find this small minority of people? This board's as good as it gets web-wise I would think, although you could put a shout out on the BJ21.com site (I've seen one or two postings there from UK based players). Try to locate where professional gamblers/gamers hang out? I think in the UK most professional gamblers (ie they make their living through making bets in the right place at the right time), either concentrate on the GGs, dogs or when it comes to cards, play poker - I have met a couple in my time.
In contrast to that, other blackjack card counters I've met mostly play for the fun/challenge/novelty factor with the aim of winning a few bob. As such I would think that, like myself, they wouldn't be looking to put the time in to do the team play thing - what would it add to their experience? I may be wrong.
Funding of the bankroll? How's that going to be sorted? In order to justify the team play angle, it's going to be necessary to bet at higher levels which may involve having to find an investor or investors - in which case the enterprise takes on an entirely new guise, especially if said investor is a type that doesn't complete a tax return every year and might take a dim view of the results of negative variance. If not, then I would think being involved in a team play scenario will provide little benefit beyong meeting like-minded people.
And then there's the issue of longevity. It's inevitable that where some serious money starts being thrown across the felt in those casinos in London that offer decent games (from an AP perspective), players will eventually get sussed and see the welcome mat withdrawn - which, as I'm sure you appreciate, would be a real problem in the UK where playing opportunities are relatively limited (there's one contributor to this board who's been busted from one of the main chains, and just can't play anymore unless he wants to travel to London to play at the independents). Why would someone want to run the risk of seeing their playing career, at whatever level, being curteiled?
About a year after I joined the board here, I received a PM from someone based in the UK saying he was putting a team together and was interested in meeting me. I gave it a miss as it's not for me. I may have been persuaded if the approach had been made by someone I knew well and where there wouldn't have been any comebacks if I'd been involved in the loss of £20K of someone else's money.
All in all, I would say don't be too cheesed off if you don't find your team, or you receive little response or interest from putting out a shout. There are UK contributors to this board who are dotted around the country and who may be willing to meet up with you for a beer and a chinwag. It depends where you're located of course.
Good cards.