I just went to book our car hire for holiday this June/ July and the price had risen by £220 from last year ! 
We have been going to the same place for the same weeks for several years now and its always been about £450ish for the car hire, .. This year £678!!. (same car , same airport, same duration dates and time of year)
Has anyone else noticed this ?
Its Avis in Greece btw , but similar uplift in prices for Hertz, Europcar etc etc.
Brexit?