Remote internet

flashg67

Talkmobile have a decent deal for unlimited data, 1 month contract so can cancel with 30 days notice - https://www.uswitch.com/mobiles/compare/sim_only_deals/
Uses Vodafone signal so should be decent coverage.

If you did stick this in a mifi/mobile router, you'll still need a sim for your phone, so maybe a cheap contract with little data like this as well - https://www.uswitch.com/mobiles/sim-only-deal/90906621862663a0d1ef3003d70c7b47c8b30903/?

 Or, as others have said, stick the sim in your phone and create a hotspot for your other devices to connect to. This does eat the phone battery though!