A D50 for £400 and a Sigma 135-400mm for £300 leaves
more than enough for a decent bag and an SD card (which the D50 uses).
For example, the Hama bag here
http://www.7dayshop.com/catalog/prod...oducts_id=6021 for
£18 (very canny bag - check out the reviews) and a 512mb sd card for
£25 -
http://www.7dayshop.com/catalog/prod...ucts_id=100517 - and you've still got money in your pocket for the lens cleaning cloth
and a spare lens cap..!