There aren't any. Some chains offer some sort of rewards points programme, based on your buy-ins, but that's it. I suppose if you drink a lot of Coke (as opposed to snorting it) at 4 drinks an hour you're gaining the equivalent of around six quid an hour at pub prices. Possibly as much as you might win counting. Free non-alcoholic drinks is about the limit. If you build up enough points you qualify for a club sandwich.
Not in the UK they're not.
Sorry to sound tetchy. I think this expectation of gaining comps is where the UK game falls well behind those in the States, not in things such as not being able to insure against anything other than a dealer ace. Unless you are a serious high roller and will be playing in one of the very up market casinos in the West End of London, there's no way you're going to get free accommodation, free meals, free shows etc. It just ain't part of the programme. I read in Kevin Blackwood's book how he flew to Belgium with the aim of exploiting a particular game, and was shocked that he had to pay for his hotel room despite having a hefty bankroll. Yep, welcome to Europe.
Getting back to the original question, my advice, for what it's worth, would be to spend some of the team's four grand on one of the el cheapo chinese-made BJ tables that can be bought on eBay for around £200, dealer shoe, discard, casino grade cards, chips etc and not play in a casino for at least 6 months. Make one visit to the casino early on - purely to see how the staff there manage the table, deal, make payouts etc, and then a second a bit later on to see if you've got it right when practising. And then spend a bit more on some good books on the subject. Then study the numbers. When you've done that you'll understand why turning £4K into £10K is either a high risk endeavour or a tall order.
Just my two bob's worth.
Good luck with it.