Was Half and Half?

Half-and-half is simply a blend of equal parts milk and cream. Whereas heavy cream has at least 36 percent fat, half-and-half has between 10 and 18 percent. Half-and-half can be incorporated in recipes, but because of the lower fat content, it cannot be used to make whipped cream since it won't hold its peaks.

Is there a substitute for half-and-half?

For the ultimate DIY sub, use equal parts light cream and whole milk. If it's heavy cream that's in your fridge, for 1 cup half-and-half, substitute ¾ cup milk plus ¼ cup heavy cream.

What is half-and-half in the UK?

Half and half is a creamer that is half milk and cream (commonly known as half cream in the UK or sometimes known as single cream).