CORONAVIRUS: All UK venues closed on 16th March 2020 and there is currently no planned re-opening time though it will not be before 1st June 2020 and is most likely to be September (according to some West End producers).
Some shows have been cancelled, or closed early, but many are being rescheduled and we are trying to keep up with the changes - assume that anything posted for April to August is actually postponed or cancelled. It now looks likely that little will return till 2021.
THEATRE ROYAL HAYMARKET, WEST END
West End > Theatre Royal Haymarket Current and forthcoming what's on, shows and events at West End's Theatre Royal Haymarket including venue details, location, news and links. Opened 29 Dec 1720. Closed in 1737 (partly for attacking the government), re-opened 1747. The current theatre opened on 4th July 1821 and was designed by Nash. The last theatre in London to use candles (1837). 888 seats. Society of London Theatre member. You can also check out the iUKTDb Theatre Royal Haymarket (West End) archive with 183 shows listed up to Sunday, 19th April 2020.