Question about the Roman \'wedge formation\'

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I was trying to post earlier that we do the cuneum formation in our displays with the XIIIIth Legion in the RMRS.
I read a book in the last year or so about the use of the formation by the legion in taking on Boudiccas horde, can't recall the title offhand.
It would certainly have cut into the large mob fielded by Boudicca, and as mentioned, trapped by the wagons and the spectators, it would have been a
slaughter.

It's great to hypothesize about such a formation against a non formal front line, but without source material it could be a little dangerous. Are we being led into one of these instances when a good hypothesis voiced in a book is beginning to take on reality as opposed to supposition?

Changing formation in the face of the enemy requires confidence and VERY good drills to achieve - everything the legions have - but surely there would be more reference to this formation in the face of "barbarian hordes" in Caesar's accounts if no where else?

And don't forget...a victory is always the sweeter if the legions were allegedly at a disadvantage. A bit of jurno technique from the great Caesar I would say - he was certainly no fool as a general to deliberately put his men at a disadvantage in order to get a more stunning victory. The ancient sources are just as likely to have spin as modern reporting of archaeological finds...(ie female gladiators assumed because a female skeleton is considered over sized!!)