The Surewin Racing Club (for the UK only) claims to have over 700 racing systems and details of 27 top tipsters and monthly newsletters containing up to date information can be found on their website. 

They are not a betting site but an information site offering to improve your gambling fun and even perhaps your profit.  There is little doubt that being informed can improve the odds but whether or not that can turn you from a looser to a winner is doubtful.  But if you want to give it a try ... you might want to try these people.

If you do give them a go please email me to let me know how it goes. It will be useful for other people.