Thanks for your query.
If the car seat will not fit with the seat belt, and the 2nd car does not have ISOFIX, the only other way to fit this is with the Surefix base.
The base only uses a fraction of the seat belt that the car seat would, plus it also makes it easier to fit the car seat (using click and go motion).
Please do not hesitate to visit your nearest Mamas and Papas store, where our store staff will be more than happy to help you fit this into your car. You can also book a free consultation online for your nearest store, please visit this link: http://www.mamasandpapas.com/car-se...
Many thanks, I hope this helps!