In my opinion a cheap, or under specced laptop, is always a false economy. Compared to a few years ago laptops are much better value, so why not consider spending a little more for something that will probably be used every day.
Regarding the one you found:
512MB is not enough memory for Vista, go for 1GB minimum.
What's the video card? If you're playing games, the video card is important, I couldn't see what it was, but it's probably not up to the job for high frame rate games.
Then there's customer support. What's Evesham's like?
I like Toshiba laptops, and for not a lot more money, you can get a much better machine, e.g.
Toshiba Satellite A100-065 - Core 2 Duo T5200 1.6 GHz - 15.4" TFT £457.97
For good places to buy laptops, see my site at:
http://www.wirelesslaptops.co.uk/
and the links on the right.
The Toshiba range is available from laptopsdirect and warrant serious consideration IMO.
As usual though DYOR.
Rgds
Accelerator