This photograph is an example of a building tha has probably had its roof raised. This particular one (On Bancroft by Sainsbury’s) seems to have had a half hipped roof from the original darker bricks that remain. The walls have been extended and patched up too. An example of just how ‘Organic’ buildings are in their constant flux and change like everything else. Buildings are rarely ‘fixed’ and forever have alterations; especially in towns.