Mr Blueskies. Quick reply on practical experience in a CX.

Inspired by this thread we got a Fulli tag ( https://www.fulli.com/ ) for our PlusFour MY2022. Fulli currently have a rebate for the registration fee, it works in France and Spain, plus it seems to work fine from our UK GBP Lloyds bank account (using the IBAN number).

We are currently travelling in France, Spain and Portugal - We did have a few problems getting it to register through the heated element of the windscreen but there is a 2 inch section down each side without the element and we attached it there (inside the glass just above where the passenger side windscreen wiper rests), which seems to work fine. see picture.

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Thanks for the thread everyone – really useful, would never have thought of getting a tag before.