Hi Andy,
I think I saw your Aero there the other day, lovely car!
Just checked my Pirelli's and they seem to be OK but I can recommend the Yoko's. Had them on my Caterham and they are an excellent tyre.
As a Series one owner, can you just confirm if your oil pressure guage reading drops to the far left when the engine is hot and at idle? I've got a thread going to try and clarify this as my newly aquired car is worrying me!
Mike