Originally Posted by
SKT-DK
The 3x weekly LGW route to BKK is about as useful as a chocolate teapot for those of us who aren’t package tourists. Sadly, it makes it impossible to use if connecting to Europe from here

It may well be that Gatwick to Bangkok route is aiming to catch that very 'tourist market'. The catchment area is quite affluent and the premium cabins sell well. The route is only winter seasonal initially.