My group rented a car at London Heathrow Airport using Holiday Autos, but the rental car agency refused to rent us a car without a passport as a secondary form of ID (We live in the UK so usually do not travel with passport). All of Holiday Autos' customer communications (in 3 different places which we checked) indicated that a secondary form of ID MIGHT be a passport but really just had to be a government-issued ID card, which is what we were using (a biometric UK residence permit). We ended up having to rent a car at another place for a much higher price in order to get to our destination. Holiday Autos needs to revise their secondary form of ID guidance and reimburse us fully for the original car rental and the replacement one!