1 in 5 attractions in the south east will remain closed for the rest of 2020.
In Kent, Sussex and Surrey 83 out of 194 museums were closed in September.
While some have reopened with new rules, 39 museums in the region say they will be closed until next year
Some exhibitions have benefitted from the government’s Culture Recovery grants, but many sites stand to lose hundreds of thousands of pounds in revenue.
Hever Castle in Kent is expected to lose at least £1.2m as a result of lockdown and restrictions.