VW group’s UK Boss announced that no less than 400,000 cars need engines software changes and fuel injector alterations.
Paul Willis, VW Group’s UK managing director explained that cars fitted with a 1.6 litre diesel engine would need the physical resolution.
The cars with a larger 2 Litre engine will need just a software change, he told the Commons Transport select committee.
Mr Willis showed remorse and said he was "sincerely and unreservedly" sorry for letting down VW customers.
"Volkswagen has significantly let down its customers and the wider public... we recognise we've fallen short of the standards expected and we will take all the necessary steps to regain trust."
He went on to say that it was in 2008 that VW first sold cars to the UK with engines that could cheat emissions testing.
A total of 1.2 million UK vehicles had been affected, but the remaining two thirds would only need software altered, Mr Willis explained.
The 1.2 million vehicles include 583,000 Volkswagens, 393,000 Audis, 132,000 Skodas and 77,000 Seats. Germany is the only country to have had more vehicles affected by the problem than the UK.
Mr Willis explained that recalls of UK vehicles wouldn’t start until the first quarter of 2016.
Any owners who would be inconvenienced by being without a vehicle during this recall process will be given a replacement car until the work is complete, the VW boss went on to say.