Instabridge does not provide unlimited data eSIM plans for the United Kingdom. All of its available eSIM offers for that country have a fixed data allowance.
Instead, Instabridge offers fixed data plans such as the 20 GB United Kingdom eSIM, which is valid for 7 days and costs $16.00 USD, and the 10 GB United Kingdom eSIM, valid for 30 days and costing $12.00 USD. These examples illustrate that the provider supplies plans with substantial data limits, and choosing a fixed data plan can be more cost‑effective for most travelers unless a user requires extremely heavy data usage.