mixture, the statement 'zip codes do not have spaces' is correct. They don't.
Oh please....
Stop clutching at straws.... I think it was quite clear the poster made the assumption that
Loose rivets was talking about US style zip codes.
As already said, the UK post code is usually written with a space for ease of reading, but the space isn't required by the Post Office's systems,
That is utter rubbish. Go read the Royal Mail Technical Guidelines for machine-readable mail !
Infact, I'll save you the hassle with the following extract :
there must be one or two character spaces between the two parts of the postcode
They even list that as a "high impact" item when verifying what you send against their specification.
So it very much is a mandatory and critical requirement !