A British driver's refusal to operate a bus with a pro-gay ad left passengers stranded for about 20 minutes.

According to the UK's Daily Mail, the unnamed driver refused to board a bus traveling from Rotherham to Sheffield because a billboard on its side included an ad from the gay rights group Stonewall.

“Some people are gay. Get over it!” the advertisement proclaimed.

But the driver wasn't getting over it. Frustrated passenger sat and waited as he loudly argued with colleagues.

“Once the driver had let us on the bus, he was meant to be swapping with another driver, but when his replacement wouldn't get on they just left us there while they had an argument outside,” said passenger Rebecca Neill, 25.

“There were quite a few passengers arguing with him and several drivers as well.”

“Then another driver got on and explained what was going on. He apologized and said that the poster wasn't acceptable to this Christian, but that he didn't agree with what the guy was doing.”

“I just thought it was disgusting,” she added. “Does he seriously think he has never had a gay person on his bus?”

The incident ended when a second bus arrived and the drivers swapped buses.