"The reason why it takes so long - and I apologise to you and our customers - the reason it is taking so long is that if you have 60 different models, five brands, five different engines with two different transmissions, it takes time. It is better to be thorough than do it in haste. It's important we take the right time to do it correctly for our customers."
1701hrs - Willis is asked if vehicles with EA189 engines in the UK contravene the rules on NOx emissions. "According to the law and test cycle, currently no," he replies. He says VW has started to correct the process by writing to owners and telling them how they can check if their car is affected - by using the VW, Audi, Skoda and Seat websites.
1655hrs - Hawes is being queried about the NEDC test cycle now. He admits the difference between real-world figures and the official NEDC figures "could well be up to 30%", and says, "These figures are meant for a comparison process and always contain a disclaimer about the real world and that is for some very sensible comparative reasons.
"The test cycle tests back to the early 1980s and the industry recognises it isn't fit for purpose. When put vehicle on test cycle, of instance, everything like air-conditioning and so forth must be switched off by law and that clearly needs to change."
"Then there's the issue of real-world driving conditions - congestion, temperature, load, gradient - all huge and all ruled out by the test cycle to get a repeatable cycle."
Hawes says he believes the more realistic testing cycle will be introduced on a compulsory basis from the beginning of 2017.
1653hrs - SMMT boss Mike Hawes is asked if he's heard of manufacturers taping up gaps and removing spare tyres from cars during the NEDC test procedure. "Never in 20 years I have heard of anything like that," he says. "If so, the VCA would step in if a vehicle was not being tested in production specification."
"Never?" checks one of the MPs.
"Never," confirms Hawes.
1650hrs - Willis tries to turn defence into an attack on the EU's emissions testing processes.
He says, "If we look at the test regime on emissions, we know it is old-fashioned and not fit for purpose. I will come to safety but this point is key for our consumers. The point is that the test regime is out of date and not fit for purpose. We need completely independent tests that look at all sorts of detail, like Euro NCAP, which uses real-world testing. We need to look at that."
One of the MPs retorts, "If we can't trust you on emissions, why can we trust you on safety?"
Willis replies, "I understand that question. We have a duty to public to reassure them that our cars are safe. There is no relation to safety with this issue but we do need to regain trust and we will do that with transparency."
1648hrs - The grilling continues. One of the MPs asks Willis what car he drives.
"I drive a Golf GTE, my son drives an Audi A1 and my wife drives an Audi Q5," he answers. "Diesel?" asks the MP. "My wife and son? Yes. I drive a hybrid," says Willis.
1642hrs - Willis does indeed appear to be stating that the VW cheat device software did affect the EU emissions tests - something that VW has so far been reluctant to confirm. He adds, "I'm not an engineer, and it seems that in the test regime the engine behaved differently to real life via software. The software affected the flow of gas to the engine which affected the results."