You will not be aware of it, but you have been a great help to me as I am writing my own book, set in 614AD. As you suggest in your writing advice, I have been studying some of the Uhtred books. I am working with a mentor and she is trying to lift me to another level. So in my rewrites I am looking for flaws and weaknesses.
One such problem was a difficulty with the battle of Chester in 616AD. Reading The Pagan Lord, I have discovered that I have got my characters crossing the river Dee when they didn’t need to. Your account of the taking of the fort has been so helpful as well as the account of Bebbanburgh, which if ever I get to write it, will feature in a later book.
I am assuming that the Celtic Britons  fought with slings, spears, daggers and bow and arrows, only the trained military using swords. Would I be right? There is so little reliable information available.
Anyhow, reading your books is of an enormous help to me.
Maureen Chapman