Oliver wrote:
"I used travellers'cheques for seventeen years but stopped doing so two years ago for the following reasons. Firstly, the charge per cheque went up to 150bht. Secondly, long waits while the teller made phone calls held -up both me and disgruntled people in the queue.. And thirdly, the exchange rate on offer elsewhere was better."

I haven't used them for many years, the fee used to be 30 baht and there was never any phone call needed, just my passport. The 150 baht fee wouldn't worry me as I'm only cashing perhaps 6 at 200 pounds each which is 900 baht and worth it for the peace of mind. Slightly better exchange rates too if I remember.