Hi Punter57

How bookies arrive at their opening prices. As no one on here seems to know including myself i have a few suggestions.

You could try emailing the following

Warren Block of Superform
Gary Crispe of Racing and Sports or
How about bookmakers themselves such as Mark Read.

You may not get your answer but its worth a try as these 3 people would definately know how opening bookmakers prices are derived

Hope this helps

Joe