Thanks guys.
I was having a Homer Simpson moment when asking the filter to get.
It was a case of being blinded by information from the internet when the solution was as easy as Deejay said.
Go in the garage and look what is fitted now! DOH.
I did and it was just as John 07 said a Mann W712/43.
Purchased from Halfords for under a fiver.
Thanks every one who responded.
