Completely agree with this tbh - much better to start a flight from outside the UK - even if it's ireland you can save £££'s on a business class flight :)
OP, I travel between the UK and Japan about 12 times a year, in business and in first class. I have explained that it's advantageous to commence the long haul segments from just outside the UK, and which airlines offer good well-priced service. My advice wasn't directed at you, it was intended to give pointers to others looking for better deals I doubt,very much, that there are many people with as much knowledge of how and where to book well-priced premium class travel.
Heat from me
You're talking POOP pal, no availability on Gulf and KLM £3000+ Post an actual deal and back up what u say!!
It's not that good a deal. There are so many better business-class options to get to BKK The first thing to be aware of is the United Kingdom Air Passenger Duty (APD) of £156 You can get rid of almost all of that by starting your long-haul segments from outside the UK I often use Paris, Frankfurt, or another "nearby" major city to avoid that ridiculous charge. You'll have no difficulty in finding biz-class seats on a better carrier than Oman Air, Gulf Air springs immediately to mind. KLM are often around this price, or less, too.