Narrowboat cruises up St. Edmund's Passage

James was sitting in the wonderful Indigo cafe, on St Edmund's Passage in Cambridge the other day, when a strange sight passed by:

It was apparently a prop narrowboat, which even seems to be telescopic! St Edmund's Passage leads to Cambridge Arts Theatre, which is showing the play Corrie! based on the TV series Coronation St. Episodes of the show have featured a narrowboat called Utopia belonging to the character Ken, so this would make sense.