Thanks Rory,folowed above and flap popped open.adjuted spring as necessary and now appears to open via release mechanism. Can now fill up and head to Newcastle on full tank tomorrow and use credit card trick as required.PS I have a scarlatti red IS200 which no doubt like yours gets many admiring glances as a result of rarity and gleaming codition.Great start to my LOC.Saves a bill at Lexus dealer.Thanks for the timely response.