i am travelling to Vietnam and my flight has a stopover in Bangkok, i have my vientnamese visa sorted but do i need a thai visa too just because i will be landing in bangkok, though not actually leaving the airport before my flight on to Hanoi??

any help is much appreciated
many thanks
x
also does anyone know happen to know how long queuing time to pick up a visa at the vientam ambassy in london is?

thanks x
*embassy! oops!

Extra tags:

I am debating whether or not to venture into Bangkok. My flight gets in at around 9pm and leaves the next morning. Is there anything to do (apart from drinking) at that time? Is it enough time to go for a wonder and get back to the airport?

Extra tags:

I have a stopover in Bangkok airport arriving at 11am and departing at 7:30pm. Should I go out to the City or stay at the airport ?