Asda bosses should be brought into the Commons to teach MPs about culture change in the wake of the bullying scandal.

Tory MP Philip Davies said the supermarket had tackled its own issues around bullying with wholesale cultural change and ended up listed by the Sunday Times as one of the best companies to work for in Britain.

The MP for Shipley, who worked at Asda before he became an MP, made the suggestion in a Commons debate on the Dame Laura Cox report into bullying and harassment of House of Commons staff.

He said: "One of the best culture changes I ever saw and ever experienced was during my time at Asda.

"They completely transformed the very hierarchical culture in that organisation - it was a very control and command kind of business when they took over.

"They revolutionised the way that managers treated their colleagues, the way that everybody was considered to have equal value within the business whatever their role was."

Mr Davies added he thought there was "an awful lot of merit" in bringing in those who oversaw the change to explain how they did it to the Houses of Parliament.

The MP also defended Speaker John Bercow, who has strongly denied allegations of bullying levelled against him, and was not in the chair as MPs began discussing the issue.

Mr Davies said the debate on bullying and harassment should not be used as a "witch hunt or an attempt to settle old scores".

Although the MP said he did not vote for Mr Bercow to become Speaker, he had "no qualms about telling people they are unsuitable for a role" and said the cultural issues in Parliament "far predate his time in the chair".