A former Harrods chief executive has told the BBC he was witness to “abhorrent” behaviour by the store’s late owner Mohamed Al Fayed – but not sexual abuse.

James McArthur, who was chief executive for what he described as a “most unpleasant 10 months” in 2008, told the broadcaster he was not aware of any sexual abuse as five women allege they were raped by Fayed.

Fayed, who died last year at the age of 94, is facing allegations of sexual misconduct by a number of others.

“While Fayed’s behaviour was often abhorrent in many ways, and professional relationships with him were largely dysfunctional, I was not aware of any sexual abuse by him – if I had been, I would have taken action,” McArthur said in a written statement.

He said he was not aware of a Metropolitan police investigation into Fayed over the alleged assault of a 15-year-old girl.

“I am absolutely horrified by the details of the allegations bravely brought to light,” he said. “My heart goes out to Fayed’s victims, and I do hope very much that they will get the justice and closure that they are seeking.”

Harrods has said it is conducting an ongoing internal review that includes “looking at whether any current staff were involved in any of the allegations either directly or indirectly”.

This came after a former employee told BBC News that a manager who still works at the store failed to investigate after she complained about Fayed’s inappropriate behaviour.

Harrods said its internal review into possible staff involvement was supported by external counsel.

It said: “Harrods board has established a non-executive committee of the board to further consider the issues arising from the allegations. Harrods is also in direct communication with the Metropolitan police to ensure we are offering our assistance with any of their relevant inquiries.”

Harrods added on Monday that its “settlement process was designed in consultation with independent external counsel and experts in personal injury litigation. All claims settled to date and moving forwards will be based on the guidance of these external individuals to ensure swift and impartial outcomes for the victims.”