Just noticed this rechargeable mouse on Tesco direct for £14.97. I have a very similar one that I am using now and find it really good. It has the forward and back buttons on the side to move back to previous page etc. I paid a lot more than this for mine although I think the original price of £49.97 was a bit ambitious. Cheapest I could see elsewhere was £31.
Logitech Cordless Click Rechargeable Mouse £14.97 reduced from £49.97 at Tesco Direct (select collect at store for free delivery to store)