They must be over 18, of sound mind, and able to see; but apart from that there are no restrictions. However, witnesses – and their spouse or civil partner – are not allowed to benefit under a will; so, do not ask your next-door neighbours to do it if you are leaving them something in your will.

If you are going to ask the window cleaner or a charity collector to witness your will, be sure to get their address. It is generally better to ask someone who can easily be traced.

They do not need to know what is in your will – they are merely witnessing your signature.