The Theatres' Trust has released its "at risk" register of threatened buildings. Blackpool's huge Winter Gardens complex tops the list, due to its poor condition and the threat of demolition.
There are 71 theatres at risk in England, seven in Wales and four in Scotland, according to the 2009 register. The Brighton Hippodrome is one of 13 new theatres on the list.
While 11 theatres have come off the register since last year, a lot of work still needs to be done to prevent the loss of these historic buildings, says the Theatres Trust.
Derby's Hippodrome - a Grade II listed building - was last used as a bingo hall and is in a poor condition. Its restoration to provide a touring theatre for the city is recommended.
Hulme Hippodrome was built as a music hall in 1901 and is extravagantly decorated. The Hulme playhouse, on the same site, also stands disused.
The Hyde Theatre Royal has spent much of its life to date as a cinema. A new entry on the register, it remains the centre of a restoration campaign.
Swindon Mechanics Institute is in a dilapidated state. The building was used for a number of functions, here hosting a fashion show during the 1920s.
The Palace Theatre in Plymouth, pictured here in 1991, now lies empty. Some theatre buildings are put in jeopardy by disputed or unclear ownership.
Stockton-on-Tees' Globe Theatre is now a disused shell, although much of its original decoration, dating from 1935, remains intact.