Government and justice departments have a 35 year lease on the building.
The charity holds a 999 year lease with effect from 24 June 1979.
The charity holds a 999 year lease with effect from 10 June 1983.
The building has a 999 year lease, so another move is not expected soon.
The companies were to build and operate the lines under a 99 year lease, with the government having the option to buy them earlier.
He was given a 30 year lease on the line.
The City bought the line outright in 1950, 36 years into its 99 year lease.
In 2001, the church signed a 30 year lease with the city.
The charity holds a 999 year lease with effect from 1 May 1976.
The charity holds a 99 year lease with effect from 1 January 1974.