0.012 inch - intake 0.014 inch - exhaust
Zip Codes aren't used in the UK. Post Codes are used which usually narrow an address down to around 10 addresses. Large buildings have their own post code. So the answer to your question is that there are thousands of post codes in London. A London post code would look something like this: SE27 5AQ or SW16 3TF or N22 8ZB