The Program ...

Day 1 Fly from Heathrow, via Thai Air, scheduled flight. 
Day 2 Arrive Bangkok.  Limousine to Swiss Lodge.  For those who need it ... sleep.  For those ready to party, out to Patpong for dinner and 'drinks'.
Day 3 Shopping in Bangkok (or sleeping for those who were out the night before!) and then a night on the town in Sukhumvit.
Day 4 Fly Bangkok Airways to Ko Samui.  Limo to Chaweng Buri Resort.  Settle in and orientation.  Mopeds will be provided for the entire time on Samui.  From this night on I'll assume you'll be out eating and partying - I will be!
Day 5 Day on the Beach
Day 6 Diving Inititiation and First Diving Trips
Day 7 Second Diving Day
Day 8 Day Off ....
Day 9 4WD safari of island & swimming in mountain waterfall
Day 10 Third Diving Day
Day 11 Fourth Diving Day
Day 12 Chill out day ....
Day 13 Fly back to Bangkok. One night in Bangkok.
Day 14 Limo to airport. Leave Bangkok.
Day 15 Arrive Heathrow