Part of developing Alexa skills involves slots. These are broadly speaking categories of words that Amazon recognizes.
Even though Amazon have recently added some new slot types to the UK, we are still a long way behind the US.
Specifically, I’m working on a skill that will allow you to play your local music library, something that’s badly needed since Amazon removed the ability to upload. In the US you have AMAZON.MusicAlbum, AMAZON.MusicRecording, etc slots which will match album names – and this has been available for over a year.
As this post on Alexa dev forum indicates, UK are lagging behind the US for almost 2 years now 🙁