Andrea Leadsom held shares in Barclays when questioning bank’s ex-boss

Exclusive: Revelation about Tory former minister raises questions about adequacy of transparency rules

It was her robust questioning of the former Barclays chief executive Bob Diamond that first brought Andrea Leadsom to political prominence.

During the Treasury select committee's review of Diamond's part, as head of the bank, in the Libor rate-fixing scandal, the Conservative MP was viewed as having been masterly in her command of the subject and her attack on the banking sector.