On buying your paper today I was very interested to read the front page article about the changes to the passport system.
I had just returned from sending my own passport off to be renewed and the address on the web page was for the Belfast office.
As you are enclosing your old passport and your credit card details, they quite rightly recommend that you should use a courier service. The cost of using such a service to send a passport to Belfast instead of to Madrid is significantly more. I paid just over 54 euros.

The passport service use a courier to send your new passport back and add the cost of this service the cost of your new passport.
So it's not just a different address, this change ups the price considerably.
Evelyn Serra