Thanks Feled. I'll see how much they charge for shipping.
Bosch wanted 32 pounds (plus 40 USD release fee here)!!!!! Nuts.
Royal Mail should only be about 5 quid.
Anyway I think the Fiamm anti-drain valve is a load of rubbish!!!
Check my oil level after 2 days and it was extremely high indicating the whole filter had drained!!
Ran it for a while and it's still a little high, about 3 mm above the max line. Got to drain some but I'm at work and don't have the tool with me now.
Have to try and keep revs to a min as not to froth up the oil until I get home.
But it had drained about 400ml of oil from the filter I'm estimating before start up.
Maybe this is why the OE filters have 2 x anti-drain valves.