The Britannia public house dates from the early nineteenth century, and whilst a long way from being the oldest building in Southend-on0-Sea, it is amongst the oldest pubs in central Southend.
It is a good example of heritage architecture, and is locally listed. It should be preserved.
Enjoy these photographs (taken this morning).
Here are some links that you may find enlightening.
Picture from the past: Britannia pub in Southend
Britannia, East Parade, Southend