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ICE has about 7,000 beds in California with six privately owned facilities and has been looking to expand its footprint in the state as its enforcement begins to outstrip its detention space.

Secondly, the level of trade the UK has with the EU massively outstrips other agreements signed in recent years.

Although demand for soundstages outstripped supply a few years ago, production has recently slowed and dampened the current need for them.

"We always had the ambition to go as high as we could, but we have probably outstripped expectations – certainly in terms of the speed in which we have got here," says director Humphrey Ker.

Decades of underinvestment in social housing also means demand in that area is massively outstripping supply - which at 4% of housing stock is significantly lower than many other countries, according to Mr Fotheringham.