There are a number of other visas which generally mean you are able to join the volunteer scheme these include:
• A passport or ‘other travel document’ (current or expired) endorsed to show the holder is either ‘exempt from immigration control’, has ‘indefinite leave in the UK’, has the ‘right of abode’ in the UK, or has ‘no time limit’ on their stay in the UK.
• A certificate of registration or naturalisation as a British citizen.
• A current passport or other ‘travel document’ endorsed to show that the holder is allowed to stay in the UK for a time-limited period.
• A current biometric ‘residence permit’ card issued by the Home Office to the holder, which indicates that the named person is permitted to stay in the UK for a time-limited period
• A current immigration status document issued by the Home Office to the holder with a valid endorsement indicating that the holder may stay in the UK for a time-limited period
This list is not exhaustive if you have a specific query about your visa please contact the volunteering team