Had a look at all their laptops between �300 and �400 and most of them are not that great.
The first decent one is this Acer if you can stretch to that (�384)
http://www.comet.co.uk/shopcomet/product/53616 4/ACER-AS5535-624G16MN
An Athlon Dual Core CPU (not a great one though) and 4Gb of memory.
But still Vista Home Basic, and the hard disk is not that big.
I guess you have a reason for buying at Comet, but too be honest I think you can get a better deal elsewhere.
None of them between �300 and �400 are that good. Most come with either Celeron or Sempron CPUs, and most have Vista Home Basic.
For between �350 and �400 you can get a better laptop than any of these.