Calling all armchair generals! Boudica's Last Stand.

[Nathan Ross]

"I see the battle somewhere around the western side of Iceni territory..." ...with this  fundamental statement you may be negating the western candidate sites (Mancetter, Ogbourne, Bicester) and other more distant sites (Virginia Water and all sites South of the Thames).

I don't think it's so much a 'fundamental statement' as an opinion. Nothing in what Alan has said so far negates any other candidate, as far as I can see.

The adjusted relief map at the bottom of your post appears to show the Britons 'outflanking' my proposed position at Newground near Tring by rushing up onto the high ground on either side. Leaving aside the unlikelihood of them doing this (with the strong possibility that the heights were occupied by Roman cavalry or light infantry, and in the process abandoning their wheeled transport and families), this 'outflanking' would be possible in any position where the Romans had high ground on their flanks, unless there are actual cliffs or dense forests to block them.

Since Tacitus's description makes it as clear as can be that the Roman position was in the defile, with high ground on the flanks, your objection could be raised against any site that meets the criteria. Only in those cases where, contra Tacitus, the Romans have taken a position on a ridge could they be considered safe, by your implication.

Prof. Will Bowden... defined Iceni territory as being co-terminus with the combined county boundaries of Cambridgeshire, Suffolk and Norfolk.

Interesting. That would make Suetonius Paulinus's march towards Colchester via Leicester and Medbourne to Godmanchester, and then rerouted march south down Ermine Street to London very much "through the midst of a hostile population".

interlocking fields of fire, obstacles and minefields... a low rampart or ditch to break the enemy charge... light artillery to be positioned on the slopes

The quote from Histories that Steve repeated above, relating to Paulinus's tactics in AD69, suggests that his method was to clear battlefields rather than to obstruct them: "to fill up the ditches, clear the fields". The idea was to leave a clear path for his troops to charge in cuneus, once the enemy had concentrated in front of his position, across "an open plain free of ambuscades", with no ditches, copses or places of concealment where the enemy could hide, rally, or hold out against the Roman assault. It's quite a different approach to the modern idea of a 'prepared battlefield', I think.

Although Vegetius says that each legion had a complement of artillery, we don't know whether Paulinus would have brought it with him from Anglesey. Bearing in mind that he was marching quickly and presumably lightly, it might be considered unlikely.