@jamesinc Thanks for that mate. I've just sent him a message.
My parts from FCP arrived today and to my shock the PCV drain hose is not only the incorrect outside diameter (won't seal at the Flametrap hole and can't be secured by the bracket in the sump), it's extremely poor quality. I went for the aftermarket option and it is just rubbish. Absolutely unusable.
Check out the difference: