The tribunal also heard evidence from Leonardo UK’s vice-president of people shared services, Andrew Letton.

He described the nature of the defence company’s policies on diversity, saying: “We have got an inclusive culture in the business. We’ve invested heavily in creating this environment.”

Ms Tanner asked Mr Letton what the company policy regarding use of the accessible toilets was before October 2024.

He said: “The practice in the company was that employees would use the facilities according to the gender that they identified with.”

She asked if that was the company’s general policy on toilet use.

Mr Letton replied: “We didn’t actually have a written policy, it was basically something that was practised.”

He also said he believed all Leonardo UK sites now had at least one single occupancy toilet in addition to accessible toilets, and that toilet facilities were being looked at as part of refurbishment plans under way across company sites.

He added: “We do recognise that this is something that needs to come further up the priority list.”

The tribunal, taking place before employment Judge Sutherland, continues.