You can get a 0% credit card which acts like a loan only cheaper because you don't pay any interest. You just pay it off before the 0% period ends, normally 12 - 18 months, and you won't pay any interest on the amount that you spent. A lot depends on your credit rating though, have you looked on:-http://www.moneysavingexpert.com/
there's normally loads of advice on there.
Also if your credit rating isn't that good there's a lot of advice on how to get it sorted so that you can start getting better deals / rates when applying for any loans in the future.