What has been found to be a contract for the sale of goods, as opposed to a contract for work and services?

A fur jacket made to order (J Marcel Furriers Ltd v Tapper [1953])
Supply and installation of animal feed hopper (H Parsons (Livestock) Ltd v Uttley Ingham & Co Ltd [1978])

In Hyundai heavy Industries Co Ltd v Papadopoulos [1980] the court seem to consider that some contracts could be either and it may depend on the issue at hand. In this case the court found that the contract to build a ship was a contract for work and services in order to find that the party who had defaulted was entitled to repay the other for that work. In that case the seller was described as builder.