Please note, charges for 1) roaming in Europe and 2) certain service numbers may no longer be up to date in price guides listed below. From 15th June 2017 EU roaming usage will be deducted from your UK allowances. For any out of bundle calls you will be charged the same or less than the standard UK rate for that usage type. Please see either roaming charges for pay monthly or roaming charges for pay as you go or charges for calling non-geographic numbers
Here's the latest price guide for EE SIM only plans.