I put 60 litres of petrol into my RR TDV8 Vogue, which was virtually out of diesel at the time. The vehicle has never had the engine turned over since then so all the petrol is contained in the fuel tank. It is at Land Rover dealer and they are telling me because it is a vougue model it will take 6 hours of labour and requires the tank taking out. Is there not a simple drain valve they can access?