Thanks guys,
Baz, yes I,m using the 1.8CVH, good idea about "borrowing" a set of leads...but I think Ronnie may have sussed this as the IVA manual states a "Manufacturer" / Trade name must be stated on the leads.....and as you say most ( I imagine ALL) leads are made to comply with the suppression requirement etc....
Tho I will keep my eyes peeled for a set of leads that actually state " suppressed" on them .
Thanks for your input guys, I suppose the IVA manual is open for lots of "Interpretation"
...just would be an annoying reason for a £90 retest etc etc for the sake of the plug leads .
cheers
andy