The Channel Island of Alderney

On this cover, postmarked in Alderney, are a pair of Atlantic puffin stamps from 2023. In the middle is a squat lobster stamp from a 2007 set that commemorated the 2005 recognition of the west coast of Alderney as a Ramsar "wetland of importance". And on the right is a 2007 Guernsey definitive that shows rock outcroppings at Albercq on the north short of the island of Guernsey.

Alderney is one of the channel islands in the English channel between England and France. It is part of the Bailiwick of Guernsey. Even though postal services are provided by Guernsey, Alderney stamps are produced by Guernsey Post on behalf of the island. But Guernsey and Alderney stamps are valid throughout the Bailiwick (which is just another way of saying jurisdiction).