G - this should give you some more ideas about buying local:
http://www.bigbarn.co.uk with a good searchable map databease - largest in UK for suppliers.
Farm shops, farmers' markets etc all should be able to give you the food you want, a a better price than s/markets like for like, and in season too.
Another you should look at is :
http://eattheseasons.co.uk for ideas of what to look for and
http://www.thefoody.com has a great farmers' market list by counties for you to play with.
It is also British Food Fortnight from 22/09 - 07/10, following Scottish Food Fortnight on at the moment, so take your stand and why buy Danish bacon, American watercress, New Zealand butter, Chinese apples, Spanish strawberries etc etc etc Buy British and support the British farmers!
http://www.britishfoodfortnight.co.uk has the info of what you can do and take part in.