According to home insurance firm LV, people in parts of the UK have to wait for up to 40 years for an allotment.
(The longest wait was in Camden at 40 years, followed by 30 years at Blyth Valley in Northumberland and 25 years in Islington, north London. So, get your name on the waiting list, otherwise by the time you get one, you'll be too old to dig it.)