Reading some threads is interesting as its brought out the difference in plot prices. In leafy surrey where i live the local council have decided to up the yearly rental by 12%. This takes a full plot, as they're known here, to a standard £69 for up to 250 sq mts, with concessions.
I got my plot in 1994 and another in 2006. In '94 i could pick the plot i wanted and where i wanted. The next i had to wait in line. Now theres a que of 46.How times change.
We have recently added another 9 x 100 sq mts plots ,with a compost area for the lazy ones, to help the overload.We also rent what were once unlettable plots free for one year as an incentive. It all helps and we did get a little assistance from the authority.