Heat your oven to 185C (fan oven).
While the oven is heating up, mix all of the dry ingredients together in a large mixing bowl.
Mix in the wet ingredients slowly until everything is combined.
I lined my loaf tin with greaseproof paper but if you have a non-stick tin you should be ok.
Pour the mix into the loaf tin and smooth out so the mixture is even across the whole tin.
Bake for at least 40 minutes. The best thing is to check that it's not too brown on top and use the old "stick a toothpick" in trick - if it comes out clean the cake is probably done.
Instead of using canned pumpkin puree I made my own - http://mrs-jones-to-be.blogspot.co.uk/p/pum.html
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