"Roger R" wrote in message
...
From time to time serious house fires are caused by flamable substances
being pushed through letter boxes. Homes in many other countries do not
have these apertures in their front doors, but instead have a separate
metal
box or cassette of boxes if flats.
http://en.wikipedia.org/wiki/Letter_box

Is the provision of a letter box in the front door a legal requirement in
the UK ?


No, you do not need a letterbox.

You are supposed to display a house name or number though.

Adam