The squirrels jumped on the Great Western Railway (GWR) 8.54am train from Reading to Gatwick on Monday, forcing passengers to flee to other carriages.
The passengers alerted staff, who tried to lure the squirrels off the train at Redhill with snacks, before trying to force them off with brooms - but to no avail.
They subsequently called the journey off entirely.
Australia: ‘Had to hop over a few rattlers on the way in today’
India: ‘Lol I just picked up a cobra and threw it out the window’
Blighty: ‘Thankfully I was able to flee the squirrels and make it to safety, fortunately I was wearing my brown trousers’