Bear with me on this one...
There are 2 patio heaters instore @ Homebase - One is £39.98 (can't remember name, and not on website), the other is £49.98 called Cuba which i have linked too.
The hottest deal though is using the £39.98 one.
Instead of buying it from homebase, go to your local B&Q (within 10 miles) and get them to pricematch it against their Madrid one which has similiar specs (link on next post).
We've just done this, and they also take 10% off, so we only paid £35.99 for a heater original sold for £114.98
I've mentioned the Cuba one for £49.98 as that seems a very good deal as well.