Calling all armchair generals! Boudica's Last Stand.

[Nathan Ross]

I've still no clear idea where it was or the orientation.

This is what I believe to be the relation between my suggested site (Tring/Newground - in red, with an alternative position in orange) and Deryk's (in blue):

   

The 'defile' in Deryk's position is far more pronounced, but I hope the plan demonstrates my objection to it as well - the apparent ease with which the Britons approaching from the Bulbourne Valley could move across the high ground - perhaps following the Ridgeway - and attack from behind the Roman position.