@Monky : You cannot use your usual UK allowances at sea but will need to pay the charges or buy roaming add-ons as set out in https://ee.co.uk/help/mobile/roaming/roaming-costs/countries/maritimeshipsferriesandcruises.
When you are in contact with EU shore based networks you may use your usual UK allowances in the EU with up to 50 GB (contract) or 25 GB (PAYG) data per billing month if you have more. If on contract & your contract started after 07/07/2021 there'll be a £2.47 / day charge for using your UK allowances in EU unless you already have the Roam Abroad Pass for £25 / month or already have it as an Inclusive Extra. Alternatively you may buy the 7-day EU Pass for £15.
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To phone EE CS: Dial Freephone +44 800 079 8586 - Option 1 for Mobile Phone & Mobile Broadband or Option 2 for Home Broadband & Home Phone
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