Stay well clear of this company. Once they have your money their customer support is non existant. Their website suggests it is possible to modify bookings on line but this does not include the length of the booking. We were in Austria and after 10 days hire wanted to return the car since it was proving difficult to use in Vienna. I could not make telephone contact. Web Chat help had no staff available and it was not possible to modify our booking on line. Given the fact I have been unable to make contact with anyone in Holiday Autos either when in Austria or having returned to the UK I am thankful that I didn't have to make an insurance claim since given my experience so far I am not convinced that would have been straightforward.