Council run. We have two half (called on our allotment starter plots) plots of 50sq mtrs each(according to my OH) We pay £22.00 per plot, two lots of water rates £8 each plot (£16) The attached plot to us is exactly the same size as ours but is shown as ONE plot on the plans and they pay ONE water rate!! £8. & £22.00. We pay £60. We have been on there 15 years. We get no benefits at all. We had to fence, drain and clear our plot. (It is a very wet allotment we have had to make all raised beds over the years) The more recent arrivals get the allotment cleared of rubbish left behind by previous holders and tidied.
Sorry I sound so grumpy but it touches a raw nerve when we discuss money paid on the plot. (Though we have won the best allotment for two years.)

I will endeavour to post a photo.