Oh dear, now I feel even more f.... stupid. At the top of the South-East reviews page are the following: 'Search' and 'Advanced Search' and 'Mark Read'. At the bottom it reads 'Mark Read' and 'All Unread topics'. Nowhere does it say 'New Reviews'.
I am definitely logged in.
I hate being a trouble to other readers, Many thanks to Mr Shins and Yorkshirefatrascal for their help so far.
Why are some aspects of modern life so difficult when computers are supposed to make it all so easy? Or maybe I'm just dumb.