Double cream is very difficult to get hold
of in Tanzania, what could I use as an alternative please?
Double cream contains a fat content of at least 42% which makes it ideal for whipping. Depending on what you are using the cream for depends on the substitute used. You need to look for a dairy product that is similar in terms of fat content, something like crème fraîche or heavy cream (this has a butterfat content of at least 36%) could be suitable for whipping for desserts or even custard for pouring.