Not if you spend five minutes at the kitchen table first. Since Brexit every network writes its own travel rules.
In the official app: your destination, the daily cost, what's included. The landscape in one breath — O2 kept free EU roaming on standard plans (fair-use ceiling applies); Three and EE mostly charge daily on newer plans (some higher EE tiers include a pass); Sky sells daily passes. Your start date decides — check, never assume.
Unlimited at home always meets a cap abroad; past it, per-GB charges begin.
Free on every network — the single control between a shock and a shrug.
A local data eSIM beside your UK line often beats daily charges — the eSIM Q&A.
Ferries and frontier towns quietly hand phones to maritime and satellite carriers at premium rates.
Ring or WhatsApp and ask your question out loud — coverage, switching, a deal you're not sure about, a bill that stalled, a call that smelt fishy. We'll talk it through in plain English.
Calls: standard landline rate (020), usually inside your inclusive minutes. WhatsApp: free on your data. We give general guidance only — we can't open or touch any network account, and we NEVER ask for passwords, one-time codes, banking or card details.