Carole Souter, chief executive of the Heritage Lottery Fund, said that the cash would also help promote tourism:
"We know that heritage is a huge draw for visitors from home and abroad.
"More than a quarter of all UK holiday activities undertaken by UK residents now involve heritage.
"These projects all offer the public the chance to explore and enjoy our rich and complex history."
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Luton-born Natalie Crichlow, 44, was visiting family in the West Indies when she was allegedly attacked by an unknown intruder in a bedroom.
Payne said the London event had been cancelled due to bad weather.
Work began on the project ten years ago and it should have been ready last year.