No need. You can make transactions and withdrawals from your business euro account and your GBP business account using your existing debit card.
To use your debit card with your business euro account, you’ll need to activate “Currency Controls” in the “Card Controls” screen. Otherwise, all card transactions – even those in euros – will continue to be debited from your GBP business account.
Once you’ve activated “Currency Controls”, euro transactions will come from your business euro account including euro cash withdrawals providing you have sufficient funds available. All other currency transactions will continue to come from your GBP business account. This means that your €100 hotel payment will come out of your business euro account, whereas your £30 train fare will be debited from your GBP business account.