Thank you everybody for your replies!

I think that I might leave the raised bed idea for now but as I dig leave pathways between the beds so I still have something to walk on that is only containing the original grass.

I can't see that they would be very big though as the bit of garden is not that big, without measuring it I have no idea how big (small!) it is. It seems to be that 4 beds are normally used for rotation but I think if I do that they might just be too small, so I don't know if it would be better to have 3 more decent sized ones instead.

About the pots - I am thinking that next year I can have fruit bushes in pots on the decking area and probably do garlic etc that way as well.

The local stables may well be my next port of call for some nice manure to dig in with the grass - that'll make the car smell nice!

Other than that, I think I just need a bigger garden!! At the moment I am only planning on sacrificing half the grass, but we'll see what happens...Digging starts on Saturday.....

Thanks again everyone!