I want to make a non-baked cheesecake and the recipe says to use a springform tin, which I haven't got. Will anything dire happen, like it all leaking out at the bottom, if I use a loose based sandwich tin instead? Do I need to rush out and buy a different tin?
There is nothing that ever NEEDS a Springform pan; there is always an alternative. A loose based sandwich pan will be perfectly OK, but you will need to be able to take a spatula around the pan to help release the cheesecake if you are not baking it (a baked one will shrink back a little). Alternatively run a strip of baking parchment around the edge. If you are doing a biscuit base, nothing will leak out of the sandwich pan.
Incidentally, don't go thinking that a Springform never leaks, because they often do.