So they cancelled their free motorhome trip due to their car seat being isofix and the motor home not having isofix points. I thought their son was now in a forward facing high back booster? I have the Joie Trillo and I'm sure there's is that brand (maybe a different model). The isofix is optional, it's the seat belt that secures the child and keeps them safe, the isofix is to mainly stop the car seat moving about when it's empty, unlike the seats like the 360. If that wasn't the case, they could have picked him up a decent high back booster for £40 and still had their free holiday.