Anne - this might be interesting to you. Its has a lot of interesting info.
http://ukpollingreport.co.uk/blog/index.php
OR:
http://politicalbetting.com/
OR:
http://www.gwydir.demon.co.uk/byelections/
Its interesting that one bookmaker has the Tories at 4/6 to win he next general and labour 11/10 though Brown is 3:1 against Cameron as choce for the next elected PM. Those looking for a good bet are saying the Tories are very overly priced based on a mass of negative headlines and the price on a Labour win is therefore underpriced. So take the odds now for a Labour win, they are generous from a financial point of view.