[2] It underwent significant renovations starting in late 2017 and reopened on 9 September 2019.

[5] It was renovated in 2000 and renamed the Millennium Hotel London Mayfair.

The hotel's Pine Bar was the site of the poisoning of Alexander Litvinenko in 2006.

[6] The hotel was renovated again beginning in November 2017, at an estimated cost of £50 million.

[7] It closed in July 2018 to complete the renovations and reopened on 9 September 2019 as The Biltmore Mayfair, LXR Hotels & Resorts[2] managed by the LXR luxury division of Hilton.