https://www.rwgmobile.wales/webshop/pay-monthly/free-100-mins-100-sms-plus-750mb-data/I have just purchased one of these for one of our cars, saving £43.
RWG Mobile are a small company using the Now Mobile network which is a virtual operator on the EE network so you get 4G and the availability of EE. You pay £15 up front for a SIM which is actually free so you are effectively topping up the SIM by £15 straight off and it then gives you
750MB of data every month indefinitely for a single one-off payment. This is more than enough if you are not using the car as a WiFi Hotspot all the time, so for just the normal Navigation data etc, we only use the car WiFi hot-spot sometimes for a short time so this is more than enough