The chief executive officer of Travelodge Hotels Ltd. has stepped down, as the chain pledged to beef up its security measures after a female guest was sexually assaulted at one of its properties.

Jo Boydell is leaving the British budget hotel operator after four years in charge, the company said Thursday. Chief Financial Officer Ray Reidy will become interim CEO while the chain searches for a permanent replacement.

Travelodge has faced scrutiny over its safety protocols after a woman was sexually assaulted by a man who was given a keycard to her room at its Maidenhead hotel. Former Prime Minister Keir Starmer was among those to criticize the company, which opened an independent review in March.

“We remain focused on the safety and well-being of our guests and will continue taking the actions necessary to strengthen the business,” Reidy said in the statement. “We will also continue to engage proactively and constructively with government and the wider hospitality industry on the issue of safety and security.”

Founded in 1985, Travelodge is one of Britain’s best-known budget hotel operators with 630 sites mainly in the UK and Ireland, as well as several in Spain. It’s owned by US firm GoldenTree Asset Management.

Boydell had worked at Travelodge for 13 years, having served as CFO before stepping up as leader.