I got an email from Trailfinders today, with a couple of offers for flights to BKK with SriLankan Airlines via Colombo for £421, and a good one through to Phuket with Singapore Airways via Singapore for £551.
Looks like you have to phone them to get these offers on 0845 058 5858
Just passing them on for anyone looking to book flights in May and June.
Economy Flights to Bangkok - book Bangkok Flights with Trailfinders
Economy Flights to Phuket - book Phuket Flights with Trailfinders