Here in Spain we have a system called CityPaq, that's managed by the national post service and that allows anyone to receive a package in a public mailbox, independent of sender. They are located at central locations like train stations, shopping centers, or post offices. Contrary to mailboxes for letters, you do not get assigned a single slot. That implies it is uncomplicated and flexible for everybody to receive packages everywhere (at changing locations) in Spain.
In Germany there's a similar system:
In both countries there are equivalent private systems, where a residential building or area get a series of mailboxes for packages. But I'm interested in the system for getting a package while backpack travelling and not spending long in the same location around the British Islands. Sending to a hostel is kind of clumsy (you have to negotiate, agree and trust someone).
Is there a similar system in the UK/Ireland?