Appears to be based on a Mobility Scooter. The West Country Historic Omnibus &amp; Transport Trust (WHOTT) Running Day at Dorchester.
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/65344061@N06">Andrew Bone</a> from Weymouth, England
CC BY 2.0
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/andreboeni/36193697850/">Micro Bus!</a>