The House of Commons Treasury select committee complained last week that Mr Brown's Treasury is exerting too much influence over policy areas which are properly the business of other departments.

ECONOMIST: Bagehot

Labour MP John Mann - who sits on the House of Commons' Treasury Committee - has called for Sir James, described as the "architect" of HBOS's downfall, to be stripped of his title.

BBC: Vince Cable 'examines ban for former HBOS directors'

But as the House of Commons Treasury Select Committee has pointed out in an excoriating report, Mr. Osborne's policy looks flawed.

WSJ: Osborne Is Losing His Allies on All Sides

Speaking to members of the House of Commons' Treasury Committee, Mr Carney said there was "merit" in discussing the bank's monetary policy framework.

BBC: Future BoE chief Mark Carney sees 'merit' in policy debate

Labour MP John Mann, who sits on the House of Commons' Treasury Committee, told the BBC Sir Fred's decision was "an important breakthrough" and hoped other bankers would follow suit.

BBC: RBS boss does 'the right thing'

Following the House of Commons Treasury Select Committee's lamentable performance in questioning Bob Diamond last week, few expect this week's appearance by Mr. Tucker to provide clear answers to the questions over the role of officials.

WSJ: U.K. Must Restore Confidence in London

First, the Commission chair, Andrew Tyrie has the authority that comes from being elected to chair the Treasury Committee by the whole House of Commons - he's not an executive appointment who can be reined in by the whips.

BBC: Week ahead in committees