Is there many UK based sports book betting that accept bitcoin and pay out in bitcoin or alt coins. Is there a big hole in the market for this that none of the big bookmakers have not got in on. Is there any reason for this.

Due to other commitments in life I haven't really been keeping upto date with what has been happening in the world of Bitcoin for the last year and a half. What all have I missed? What all is happening on August 1St and will it have a negative affect on bitcoin?