In a 'security sensitive' part of London,
Housewife Rachel Wardell was due to be the first to take up her position at 9am this morning - although she was narrowly beaten to her post by a protester who scaled the plinth and unfurled a banner warning of the dangers of tobacco.
Stuart Holmes brandished his sign, which read: 'Save the children. Ban tobacco and actors' smoking', and initially refused to come down.
There's never a trigger-happy anti-terrorist cop around when you need one, is there?