Actually, so far I don't need an extension or anything like that, but I was wondering, which embassy is relevant Polish or British for issuing such a letter if I'm a permanent UK resident with a polish passport? :O
Cannot believe you don't understood such a simple thing... Your screenshot regard to RENT THE CAR ONLY! Most rental car companies don't require IDP and this is true,
BUT if a serious accident happens your driving licence isn't valid at all!
IDP is obligatory! Please stop giving such advice to people as is completely unserious and wrong, what the potential perpetrator of the collision can say police? I don't have IDP because
Without an IDP, your British driving license is not valid because it is simply not international, you will easily see when a serious accident happens and you will be surprised when the insurer will not be willing to cover the damage. Good luck