[quote=""Rowan""]
they also mention a statue of a Roman eagle which also figures into the story, which is a bit confusing.[/quote]
It's quite possibly this:
http://www.bbc.co.uk/ahistoryoftheworld ... UnhnEJkAAw
Note the statement at the end of the description, which says that it is NOT a military standard.
Reading the book will give you a much better understanding of the film, IMHO. Plus you'll really enjoy it.
I see that Simon Scarrow is not the only one to misspell Sutcliff's name (a crime I myself have been guilty of). In the link above, which is on a BBC website, it's also misspelt!
