Adamson followed the man down to reception to make a complaint.
She said: “The people on reception said, all we can say is we’re really sorry, accidents happen, and they were quite dismissive of it.”
But she questioned how the mistake could have happened, given widespread reporting of security breaches in the press.
In March this year, Travelodge said it had made “immediate changes” to its door key policy after a hotel guest was sexually assaulted by a man who was given a key card to her room.
Kyran Smith, 29, from Staines, Surrey, was jailed in February for seven-and-a-half years following the attack at a Travelodge in Maidenhead, Berkshire, in December 2022.
Since then, dozens of people have contacted the BBC to describe experiences that they believe expose “industry-wide failings” in UK hotel room security, including at Travelodge.
On 30 March, Jo Boydell, CEO of Travelodge, said: “We’re working really really hard to make sure that we get this right going forwards.”
Adamson said: “I would have thought after all this time they would have done something to put it right.
“My worry is if it happens to someone else who is alone in a room, because there doesn’t seem to be the security checks in place.”