Yesterday I checked a bunch of pages here and there about that bookie and found nothing criminal (no more than several complaints - compare with thousands on bwin). So I decided to register and deposit 500 pounds.
Winning 200 pounds on several soccer expresses was sufficient to cut off my max limit to 5 pounds. It's ridiculous! I could never ever imagine that the bookie with such strong world-wide reputation could be so petty!
Today I've talked with the support. They said: "It was a traiding decision to cut off the limits". However they promised to review it once more and email me the results. Stay tuned...
P.S. for web spiders "William Hill bet limits cut off"