Leaving the villa we made good progress until we got to the second ferry (there is a ferry from Koh Lanta Yai to Koh Lanta Noi... which we drove straight on to; but there is a further ferry from Koh Lanta Noi to the mainland). We boarded the second ferry, but is just sat there for about 20 minutes until it was good and ready to leave. The Gorse Fox supposes we were lucky really, apparently during high season the delays can be several hours. The sooner they build some bridges, the better.
We had to ensure the hire car (a Mitsubishi Pajero Sport - 7-seater 4x4) was filled up before returning it, so some 50kms later we turned onto Route 4 and stopped at the gas station recommended by CH and CC. Three quarters of a tank for just over 1200 baht (£24) seemed like a bargain. With a full tank we set off on the final stretch to Krabi AIrport. In all the 90km took about 2 hours - which in the scheme of things seemed pretty good.
Having arrived at the airport in plenty of time, we went and found a place to grab a bite to eat. Then we sat an 'people-watched' until it was time for the next leg of the journey - the flight to Bangkok.
We saw the German family who had been on the dive boat with us on Tuesday. They were heading back to Frankfurt and said how much they had enjoyed the diving. We also saw what the Gorse Fox can only describe as a furniture salesman from Bolton with his Thai rent-a-bride (who may just turn out to be a rather ugly lady-boy).
The flight to Bangkok was uneventful - though we did have to re-route round a rather large thunderstom in the Gulf of Thailand. Suvarnabhumi Airport was as impressive as ever. Once through the transit gates you are present with a vast shopping complex.