This petition was rejected

The Government e-Petitions Team gave the following reason:

There's already a petition about this issue. We cannot accept a new petition when we already have one about a very similar issue.

You are more likely to get action on this issue if you sign and share a single petition.

If you want all restrictions on such events to be removed, we have published the following petition, which you might like to sign:

Lift restrictions on all social gatherings such as proms, graduations, weddings: petition.parliament.uk/petitions/563793

Whether or not educational institutions hold proms or other formal events is a matter for individual educational institutions, although any such events would need to be in line with Covid-19 restrictions.