There was an interesting article about this on the stage, it stated
Early talk put the bidding at about £12 million to £15 million. This sounded a bit uppish to me – but not impossible. The 893-seat theatre is beautiful, but not unproblematic – there are only 67 years on the lease, it’s Grade I-listed, requires refurbishment and its freeholder the Crown Estate has a reputation for being a bit tricky. Plus, recent programming has been patchy – it recorded an operating profit of just £56,000 in 2016/17 (although it was in excess of £430,000 in 2015/16).
However, the latest rumour is that two overseas buyers are keen. The numbers now being spoken of are in excess of £30 million.
If there is any truth in this – and it wouldn’t be the first time that rumours of foreign billionaires buying into the West End have proven to be false – it is absolutely bonkers.
To put it in context: Nimax bought the much larger and more financially viable Palace Theatre for £20 million in 2012.
https://www.thestage.co.uk/opinion/2018/editors-view-who-will-buy-theatre-royal-haymarket-at-what-price/