Calling all armchair generals! Boudica's Last Stand.

[Nathan Ross]

preventing movement along or behind a ridge top.

Although if your suggestion is correct and the Britons are able to deploy onto high ground without difficulty, then I'm afraid your map shows that the 'surrounding' swamps and jungles would not have prevented them from doing so at Church Stowe either. In fact, they would be able to surround the Romans completely.

   

field fortifications directing any approach to the opening of the throat to the east.

Your imaginary field fortifications could be deployed just as easily at Newground, of course, thereby blocking all rebel access to the high ground - if it works for you then I can use it too!

they could bimble along those ridgetops or the Icknield Way for many miles

'Bimbling' with ox carts? There's a good reason why the Iknield Way, and most other native tracks, follow the low ground. Besides, as I've said, Tacitus describes the position as being in a defile. If the Britons were able to 'bimble' up onto the flanking high ground with ease, Paulinus would not have chosen that spot.

if the Romans had a depot in the vicinity... you know like at Weedon, oh gosh that's Weedon

That's a big 'if'!

And if they did (there's no evidence for it, of course), why would Paulinus have left his artillery at a depot in the Midlands while he went off on campaign against strongholds in Wales and Anglesey? Wouldn't he have needed it?