Tim Piggott-Smith and Oliver Chris will reprise their roles in King Charles III'
There will also be an anniversary CD released on the day of the gala, 22 September
Sam Yates' production, part of Jamie Lloyd's Trafalgar Transformed season, opens at the Trafalgar Studios in October
That's Entertainment will tour the UK and Ireland from January 2015
The Notting Hill venue will reopen at the historic Coronet playhouse in October
The Olivier Award-winning comedy embarks on a UK tour next month
The show, which features a range of Manilow hits, hasn't been seen here for ten years
Seven shows are recognised this week, including Lippy and The Initiate