Along with other venues Compton Verney is open again. I see both the Cranach exhibition is available and also Fabric: Touch and Identity. Here is a link:
https://www.comptonverney.org.uk/whats-on/
And in Cheltenham itself both the Gardens Gallery http://www.gardensgallery.co.uk/ and Chapel Arts https://www.thechapelarts.com/ have re-opened.
Best wishes
Bridget