I would like to know site(s) which contains the historical data on
horse racing. In particular, I am interested in the following data:
- odds which were available on one of major betting exchange sites (eg. Betfair)
- it does not matter if the history is for one month or one year, I
only need certain time period covered and the page must be regularly
updated
- for each horse race I need date and time of race, odds for back and
lay before the race starts and then the minimum and maximum odds for
each horse during the race (In-play betting)

I am looking for similar information.  My curiousity is mostly for
exotic bets.  If you have found any information for you query, could
you tell me what you have found?  I can share my data as well.