Just found a good deal in 'Game' if anyone is interested.
They're selling a 3DS for £149.99 with a 3D game (6 to choose from) however,
if you have an old DS lite that you're thinking of upgrading, you can trade it in and get the 3DS for £69.99
Unfortunately I can't utilize such a good offer because I'm intending to give the old DS Lite to my GS but I can still save £20 on the the ticket price of a new 3DS ........... I can buy one of the traded-in DS Lite's for £60 then immediately use it as trade-in against the 3DS.
This makes it the same price as Amazon (£129.99) which appears to be the best price I've found so far, but this way I'll still get my Game loyalty points
Oh, by the way, if anyone wants a DS Lite for a young-un, the traded-in consoles (selling for £60) come with a 12 month warranty.