On 23 June, the Prime Minister announced changes to lockdown measures that would apply from 4 July.
As part of this announcement Government has confirmed that museums and galleries can reopen from 4 July under social distancing measures. Theatres or venues will not be able to reopen for live performances but can open for screenings.
https://www.artscouncil.org.uk/covid-19/covid-19-government-guidance