I have the same issue with non o, but I'll just get a cheap exit just in case. It's the airline staff at the uk airport that will prob ask you....or use flyonward or some such..
how about if you put all the money $23k into your Wise account first then send?. Thus avoiding the connected bank fee? Is thatveven possible? I was pretty confused by Wise instructions really....ha ha
just wait until.a week before your 30 days is up then go to your local.immigrarion with TM30, passport photos etc and fill out the form for an extra 30 days - 1900 bhat