If you take a reading of your meter everyday for say 10 days then contact your supplier with these, they should be able to tell you if there is any problems with your meter :)
Have to agree with jake-the-peg about you maybe having one too many zeros in your consumption figure. My 2-bed semi with full heating uses about 45000Kwh and most of that is used during a Scottish winter. Either that or you have a serious problem somewhere.
i live in a 3 bedroom house with gas central heating our gas bill for the last 12 months was �350. i do think there might be something wrong with your meter