Picture posting is enabled for all :)
courgettes - are among the most productive in terms of space used and length of season....they'll queue to give it away to you!
The one thing that surprises me about your choice of vegetables is the absence of French and runner beans. Surely the very best of allotment products. But one man's meat and all that.
P.S.Thinning carrots increases yields. Tightly clustered they just never achieve any size.
At the risk of going off at a tangent have you given any thought to the other potential crops you could grow? Relative to the effort put in you can get superb value from growing soft fruit, herbs and even flowers. Last year I suspect that the most valuable harvest throughout the whole season was a large bunch of peonies that would have set you back at least £10 from any florist.
Surplus raspberries, blackberries and rhubarb we just wash (cut up the rhubarb in chunks) and freeze. They are used in crumbles and such like over the year. Jam and pickles (runner bean chutney is so good!) we buy from WI and church stalls, to outsource the hassle, though my wife does still make (very good) marmalade.