I'm planning a touring trip of Ireland, arriving at Knock airport, so need a hire car. I've read all the warnings about the hard sell of SCDW that I'll probably get when picking the car up, and I'll definitely need something like that as I don't have a credit card for them to put the £1,500 odd block on. I've also seen that you can get third party insurance that offers much better features for less.
Would the car hire company/desk ever take the third party insurance as SCDW replacement, so that they don't ask me for a credit card with at least £1,500 on it?
I've looked at various car hire sites and they don't seem to acknowledge the existence of third party insurance.
I'll be limited to car hire companies at Knock airport, so Budget, Avis, Hertz, etc.