As of Monday 19th July 2021, the government has removed all COVID legal restrictions.
This means that there are no longer any restrictions on the number of ringers allowed in the tower nor on the duration of ringing. The CCCBR has a summary of guidance here.

However given the continuing high incidence of COVID in the Lancs Association territory, particularly in the Manchester and Liverpool areas, we urge you to remain vigilant and highly recommend the following measures are retained:

Recommend that masks are worn when ringing in the tower

Be sensitive to those ringers who feel uncomfortable about having lots of people in the tower

Continue to sanitize hands before and after ringing and if changing rope

Recommend that all ringers take a Lateral flow test before joining a ringing session

Ensure good ventilation in the ringing chamber. Less ventilation = less ringing time!

Think carefully about whether you admit visitors - not part of the usual band - into the tower.

Check your local government guidance about COVID prevalence and if in doubt, don't ring.

The Central Council have issued a roadmap to ringing resumption (see "Latest News" article).

CCCBR advice here

ART Newsletters on recovery of bellringing after COVID are here

ART Survival and Recovery Toolbox here

ART article on Recovery Champions here