hi stephen
when buying laptops for less than £300 you may find they will be either windows xp or windows 2000,and sometimes windows 98se
a good company is morgan computers at http://www.morgancomputers.co.uk/default.asp,and they have a excellent deal at the moment on a ECS 321 notebook (http://www.morgancomputers.co.uk/shop/detail.asp?ProductID=4535&CategoryID=11&SubCategoryID=#reviews)
this laptop is just £234.99 inc VAT and for that you get a Intel Celeron M 350 (1.3GHz) processor and 256MB DDR RAM ,the memory may be slightly on the low side but so-dimm memory is quite cheap to buy
other specifications include a 40GB hard disk and combo CD-RW/DVD ROM ,4 x USB 2.0 ports, parallel, serial, VGA and PS/2 ports
this wont beat any speed records but for your needs it should be fine
another laptop worth considering is the Acer 7004 17" Screen notebook(http://www.morgancomputers.co.uk/shop/detail.asp?ProductID=4594&CategoryID=11&SubCategoryID=285),with a AMD Sempron 3500+ processor (1.8GHz) and 1gb of ram this is quite good for its low price tag
other features include a 80GB hard disk and multiformat DVD writer ,plus the nVidia 6100 128MB shared graphics are pixel and shader model 3.0 ensuring excellent graphics and gameplay possibilities
the Toshiba A200 Vista(http://www.morgancomputers.co.uk/shop/detail.asp?ProductID=4404&CategoryID=11&SubCategoryID=250)is another decent sub £300 laptop and has some excellent specs inlcuding :
Toshiba Satellite Pro A200-1JW, Toshiba part number: PSAE1E-00N002EN
Intel Celeron M 520 (1.6Ghz) processor, 1GB DDR 2 Ram
120GB hard disk drive, 15.4" TruBrite Widescreen TFT (1280 x 800 res)
Multi format DVD Writer drive, Intel GMA 950 256MB Graphics (Shared)
6 in 1 card reader, WiFi networking, Windows Business edition installed
hope this helps mate ,however any problems let me know
good luck stephen !