In Hull [and parts of the N/East] 'Tansad' was the generic title for any folding pushchair. The originals were made by Tansad Metal Fabricators, Birmingham. I think the originals were built from recycled Panzers and usually carried four kids, 2 sitting and 2 standing on the heavyweight mudguards over both wheels. The folding handle had a fearsome reputation for removing small kids fingers!