That's nice. La Poste (the french mail service) has a similar service: https://boutiqueducourrier.laposte.fr/lettre-en-ligne (in french obviously) and it's relatively cheap too. They have quite a lot of options such as recorded delivery and high priority mail.
I'm too lazy to search but I wouldn't be surprised if royal mail did the same thing in the UK
I'm too lazy to search but I wouldn't be surprised if royal mail did the same thing in the UK