The row that led to the inquiry also led, you may recall, to the UK Border Force chief Brodie Clark being suspended and later quitting.

BBC: Key question from borders report

Brodie Clark, head of the agency's Border Force, said the concealed drugs were all found during searches at ports, airports and postal sorting depots last year.

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The former UK border force chief Brodie Clark resigned earlier this month after being accused of relaxing immigration controls beyond certain limits that Home Secretary Theresa May had authorised.

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Brodie Clark resigned as head of the UK border force last week amid a row with Home Secretary Theresa May over the relaxation of passport controls during a pilot scheme last summer.

BBC: UK Border Agency

But controls were tightened again six months ago, following a row between the home secretary, Theresa May, and Brodie Clark, then head of Britain's border-control workforce, over the relaxation of immigration controls.

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He said the head of the UK Border Agency, Rob Whiteman, had rightfully suspended UK Border Force chief Brodie Clark after learning that he had authorised staff to go further than ministerial activity on border relaxation.

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Mrs May has ordered an independent inquiry into the claims and Brodie Clark, head of the UK border force and a board member of the UK Border Agency, is among three people to have been suspended.

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After Theresa May's doing over last week, around the shenanigans at the UK Border Agency and the controversial relaxation of border controls, the Home Affairs Committee take evidence from Brodie Clark, the official at the centre of the affair.

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The question that may be most interesting to focus on today is this: If Brodie Clark was "no rogue" who else did know what was going on and for how long and what are ministers now going to do about it?

BBC: Key question from borders report