Allotment gardens are characterised by a concentration in one place of a few or up to several hundreds of land parcels that are assigned to individuals or families. In allotment gardens, the parcels are cultivated individually, contrary to other community garden types where the entire area is tended collectively by a group of people.
The individual size of a parcel ranges between 200 and 400 square meters, and often the plots include a shed for tools and shelter. The individual gardeners are organised in an allotment association which leases the land from the owner who may be a public, private or ecclesiastical entity, provided that it is only used for gardening (i.e. growing vegetables, fruits and flowers), but not for residential purposes.
The gardeners have to pay a small membership fee to the association, and have to abide by the corresponding constitution and by-laws. However, the membership entitles them to certain democratic rights.
That's according to Wikipedia, for me they represent a great photo opportunity, so a weeks worth of shots from Leeks Allotments