And those fees you would be charged (by your local bank!) aren't exactly their fault so try to keep calm and talkactive.
I would just eat those £10 and get over that hurdle.
Hey, did you ringed up their support chatbox, right bottom side of the screen? It signals if somebody from support is present. Try to fetch some of them, arranging a phone call or similar. Should be doable near GMT zimezone.
Your reasoning should be: "I am the owner of my bank account and willingly transfered the funds to you, you can see on the Subject: line from account statement. That's no different from that 0.01 transfer required to verify this IBAN inside the SEPA zone."
Another issue would be transfer limits for a new account, they are as low as 300 bucks. You wouldn't be able to FOMO lots, anyway.