It has just been announced that the new revival of Hello, Dolly! starring Imelda Staunton (Harry Potter and Order of the Phoenix, Freedom Writers) has been postponed. The highly anticipated production was due to open at London's Adelphi Theatre on 11 August 2020 for previews. The new Hello, Dolly! dates will be announced as soon as they have been confirmed.
SOURCE: London Theatre Direct at 08:00AM on May 29, 2020