I have had a detailed look at this Mifold seat, which on the face of things, seemed ideal. It has got a number of bad reviews, nearly all for the same reason that the side clips slide into the seat base in use and jam the seat belts, making it impossible to undo the belts. It also got a very poor safety review on Which and is listed as a "do not buy".

Someone else suggested the Trunki Boostapak. Anyone any experience of this.

Wilson