Thank you so much for taking the time to reply to my post. I will talk to my local farmers about manure and get digging. I was especially pleased with your advice about the cold frame and green house as I really want to get a lot of use out of these because I've never had them before. I'm going out tomorrow to get some short carrot seed.
I am really lucky to have the garden, you walk in through a tiny gate in the wall and then it is the closest thing I have ever seen to 'the secret garden', it's quite beautiful. It already has established fruit trees and bushes, which unfortunately have been left to their own devices for a number of years, so after I've done some research I am going to try and bring them all back to full productiveness.
I may not have a lot of knowledge on the subject of grow your own, but I have a lot of enthusiasm, and I keep finding little gems like this site where people are more than happy to help out with advice and things they have learned themselves.
Thank you again
Sarah