Posting anxiety

Weird experience trying to post a letter in London. The post box had two slots, that looked they were separared inside. Above one was a sign that read "metered" the other one's sign had long been broken off.



There was nothing else to explain this. Google thought metered was a mispelling or something to do with US business mail... Then a lady posted a letter in the unmetered one. She didn't really know and pointed me to a Post and Go round the corner. Talk about snail mail anxiety!

Location:London