Humber mail hmail/sg

It looks like you're referring to the Humber Mail HMAIL/SG!

The Humber Mail HMAIL/SG is a type of mailbag designed for use on the Humber Bridge, a suspension bridge that spans the Humber Estuary in eastern England. The HMAIL/SG is a specialized mailbag that is designed to be used on the bridge's pedestrian and cycle path, allowing mail to be transported across the bridge safely and efficiently.

The HMAIL/SG is a sturdy, weather-resistant bag made of durable materials, with a secure closure system to prevent mail from spilling out during transport. It's designed to be easy to carry and maneuver, making it perfect for postal workers and mail handlers who need to transport mail across the bridge.

The Humber Mail HMAIL/SG is an important part of the postal service in the region, ensuring that mail is delivered efficiently and reliably to residents and businesses on both sides of the Humber Estuary.