I use a company called Woodland Global Group to handle all my imports.
There is probably cheaper company's out there but I have an excellent relationship with Woodland. They don't just handle all the freight from A to B but they also pay all duty and vat on my behalf. I just upload funds into my account with them and they do all the rest.
I looked into importing goods out of Thailand, bamboo and coir were 2 products I was interested in, not only was China and India slightly cheaper for the products, the freight was coming in cheaper too.
Goods sent to BKK will probably be shipped to Singapore before being shipped to the UK. I always look for suppliers within close proximity of a major shipping port, keeps internal freight fees to a minimum.
I would say you would be looking at £240 plus to ship a 1000kg pallet, the pound is very weak at the moment, I only got $1.39 to the £ on Friday.