Useful Info for International Mail

My very United States self has to shop out a package to the United Kingdom. Normally I have the luxury of the flat-rate priority box's online label and postage system, but not today. These are salt and pepper shakers and it would be a crime to double the shipping cost just so I don't have to wait in the three person line at my post office.

So!

How the hell do I format the address label?

I like official answers from official sources, so I went to royalmail.com (UK mail service) which brought me to http://www.postoffice.co.uk and the exact information I needed.
Here's the direct link and here's what it said:

When sending mail to someone in the UK, you should write the address as follows:

• Line 1: name of the person you’re sending the item to
• Line 2: house number and street name
• Line 3: locality name, if required
• Line 4: post town, printed in capitals
• Line 5: full postcode, printed in capitals on a separate line

Addressing international mail

Addressing formats vary by country, but ideally you should include:

• Line 1: name of the person you’re sending the item to
• Line 2: building number and street name
• Line 3: name of the city or town
• Line 4: name of the province, state or department and postal code
• Line 5: name of the country, in capitals

When addressing international mail:

• write the country name last and in capitals
• write your address on the back of the envelope so it’s easy to return your item if there’s a problem delivering it
• start each line on the left (do not centre the lines)