Note is for https://www.openstreetmap.org/node/8097315858

Even though Royal Mail did not make their information public domain, checking their site for this postbox (https://www.royalmail.com/services-near-you#/results?&postcode=BN3%206SE&latitude=50.836274&longitude=-0.162559&searchRadius=40&count=7&officeType=postboxes&filters=&selectedName=WILBURY%20VILLAS) states "The latest times mail is accepted can vary - please see information displayed at the location".

I wonder, if https://wiki.openstreetmap.org/wiki/Tag:collection_times:signed%3Dno would be the more appropriate tagging.

K