Social distancing signs on the door window glass of a London Docklands Light Railway (DLR) B07 train
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/47739225@N08">citytransportinfo</a>
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/citytransportinfo/50746204878/">DLR-B07-SocialDistance-Doors-SignP1650469</a>