I can sympathise with the clay I'm in Leicestershire. I have tow allotments and I am working tons of manure and compost into it each year. Fortunately I am friends with a farmer who lets me have free rein on his muck-heap - as long as he gets a few veg.
Previously was in Cheshire with lovely loam. At least my arms and back are getting stronger with the extra work.
My pumpkins don't look anywhere near as good as those in the picture - lousy cloudy weather this summer. Never mind it has suited the brassicas - let them eat cabbage.