try the what3words of your front door (or back). I do know the UK emergency services have used it since pretty much the start. It is a UK invention. I would think Royal Mail & Parcelforce would be up to speed.
After all it is the difficult addresses that cost the most to deliver to.

I commissioned an embroidered T-Shirt in Sidmouth during the festival and they had problems, but it came before the Friday. The shop was in the alleyway between the Fore St & Old Fore St. The shop owner blamed the courier who were declining to enter the town during the festivities. And I believed her. It HAD to be red of course.