Bear in mind the 40D isn't a low-end camera, it's what Canon term "Prosumer". I had one for a good while and only upgraded to the 50D (which is very similar) when the shutter failed. It's a massive amount of camera for £60. Fast, too.
I also have the Tamron 17-50 f2.8 and Canon 17-55 f2.8 IS. The Tamron is a fantastic lens and a bargain, but the Canon is the better lens- faster/quieter AF and IS is a godsend.
There is an element of buy cheap buy twice here.... You can pick up the Canon for just over £300 secondhand- I bought mine on these very forums. Well worth saving up for.
Thanks for the info, and glad to hear its a really capable camera. Having read the reviews and played with a few dslrs and mirrorless in the shops I was leaning towards a dslr anyway, the 40d for £60 just makes it a no brainer.
I'm hoping that I love the camera in which case I can just use it and be happy, slowly learning and building up experience and increase my lens as needed. If I don't like it then I think even with an expenditure of approx £300 for the 40d and tamron lens shouldn't be hard to sell for around the same price I paid for them....hopefully I won't need too!