@Pagllim - I may need to offer you an apology.
I have no problem doing that when/if I am wrong.
Having boldly stated that WISE rates were always better, I thought that I should do a current calculation. I haven't got time to do a full comparison (on a 'working' day) but it seems that on a transfer of 2m Baht, bank to bank is 2,643 Baht better (before local Thai bank commission). On a GBP 2,000 transfer WISE was only marginally better.
I will investigate further, and apologies from me.