Tesco has launched an investigation after a female cashier allegedly said that gays should "die alone" and "shouldn't have babies".
The cashier allegedly made those remarks to Natalia Embleton and her girlfriend in a Tesco Extra in London's Surrey Quays.
Embleton told the Evening Standard that the cashier made the remarks about a pregnant lesbian couple in front of them in the queue.
When she challenged her, the cashier allegedly said that homosexuality was wrong and that, as the UK was a free country, she could say what she liked.
A spokesman for Tesco apologised for the "inappropriate comments" and said that it had launched an internal investigation into the incident.
"We work hard to make sure that everyone is welcome at Tesco and put great emphasis on celebrating diversity and ensuring that we are an inclusive place to work and shop," he said.
"Any remarks or actions from our colleagues which are not in line with these beliefs are not acceptable and will not be tolerated."