You are wrong Sandy.
It doesn't matter to you that you are wrong because you are comfortable with what you do. I only point out that you are wrong because you are misleading others with your post.
WISE is always better than using HSBC.
On a transfer of £1,000 via HSBC £995 is sent after the £5 charge; that equates to 40,929.32 using BKB's TT rate of 41.135. Less the 200 Baht minimum @0.25% charge = 40,729.32.
Same £1,000 with WISE gives a net transfer of £993.62 after their charge of £6.38. With their (always) superior exchange rate of 41.5684 yields 41,303.19.
583.87 Baht difference is not "too close to call". For me it is closer because as a former HSBC employee I don't pay the £5 charge......I am only 378 Baht better off......but my money arrives in 6 seconds normally.
On larger transfers the saving is even greater:-
On a transfer of £10,000 via HSBC £9,995 is sent after the £5 charge; that equates to 411,144.32 using BKB's TT rate of 41.135. Less the 500 Baht maximum @0.25% charge = 410,644.32.
Same £10,000 with WISE gives a net transfer of £9.942.61 after their charge of £57.39. With their (always) superior exchange rate of 41.5684 yields 413,298.39.
2,654.07 Baht is certainly not "too close to call"