Well, as near normal as is possible, subject to all the caveats associated with COVID and the specific circumstances in your local Tower. The CCCBR has published all the relevant information on their COVID page (click to read their blurb)
Guidelines changed on the 19th July 2021, such that it is now down to personal considerations as to when and how ringing is done. Due consideration should be made to all participants and anyone involved, whether ringing or not.
The current CCCBR guidance summary can be found here. This details recommended mitigation and explains why/when it is advisable.