Moving crypto from Korean to UK exchange

I'm British and set up a Korbit account many years ago and forgot about it. Turns out it had some BTC left in it which is now worth about $1000.

Korean regulations state that I can't cashout here (because I'm not a Korean citizen) so I was thinking about sending the BTC to my UK Coinbase account (that I also set up years ago) and cashing out there.

What would be the best way of sending it? Should I just send Korbit BTC account to Coinbase BTC account and cashout? Or would the fees be high? Bear in mind that I'm only transferring for the purpose of withdrawing.

I've been out of the game for a while so I apologize if this all sounds amateurish / obvious.

TIA