Times are hard at present in the mikey household, so every penny counts.
I recently bought one of those Halogen heaters. Its got 400w, 800w, and 1200w settings and is ideal for a small room. I mean 400w is only a few bulbs worth of lecky after all.
It was from ebay and cost £11.99, including p+p.
Something I have found out these last couple of years is that you really can manage with less money if you have to. I wear long johns and a thermal vest under my clothes when I am in the house. If its really cold, than I wear a woolly ski hat as well. The long johns really make a huge difference you know....I can't think why I didn't wear them before.