Visiting from the UK; cell service?

Hi! I'm visiting for a week next week and trying to work out my options for cell service while out there.

My UK network will be £5 a day for roaming on unlimited data, but calls to US numbers are slightly crazy costs (£1.50/min). Is there a provider which would either be cheaper on data or generally better for coverage?

Ideally a SIM card which I could pick up at the airport but can also work with an eSIM if absolutely needed.

I'll mostly be based around the space center.

Thanks for any suggestions!