[BleverCastard]

You can drive a minibus within the UK as long as the following conditions apply:

you’re 21 or older
the minibus is used for social purposes by a non-commercial body
you’ve had your driving licence for at least 2 years
you meet the ‘Group 2’ medical standards if you’re over 70 - check with your GP if you’re not sure you meet the standards
you’re driving on a voluntary basis and the minibus is used for social purposes by a non-commercial body
the maximum weight of the minibus is not more than 3.5 tonnes - or 4.25 tonnes including specialist equipment for disabled passengers, eg a wheelchair ramp
you’re not towing a trailer

Source:
https://www.gov.uk/driving-a-minibus