If it's in the Greater London boundary, regardless of whether the place doesn't gave a "proper" London postcode e.g., Romford "RM", Enfield "EN" etc, it's a London review.
East would be Cambs, Beds, Norfolk, Suffolk, Herts, ( possibly Essex)
South East would be Kent, Bucks, East and West Sussex, Surrey ( possibly Essex)

Of course others will have their own opinions.
