How much of the uks (Britain's) land mass reduced over the past 100 years?

Question

How much of the uks (Britain's) land mass reduced over the past 100 years?

Answer 1

Very little.  Unless you include their ex-colonies.

Answer 2

Britain's seal level has risen almost 8 inches and the coastline has receded up to 90 feet in one hundred years.  The United Kingdom has 94,600 square miles of land area and 5000 miles of coastline.  That would mean at least 4489 square miles of eroded land, or about 4.5% of the United Kingdom that has disapeared in one hundred years.