I thought you might be interested in the http://www.flodden1513.com/ website which covers a lot of the events and activities taking place in commemoration of the Battle of Flodden this year.

Another thing you might be interested in is a little known tunnel in the moors just west of Bamburgh which may, with a bit of writer’s magic, be of use to Uhtred in his pursuit of regaining Bamburgh Castle!  The following is taken from http://faeryfolklorist.blogspot.co.uk/2009/09/cateran-hole.html

The Cateran’s Hole, in the middle of deserted moorland, is according to legend the start of a long underground tunnel leading all the way to the Henhole in the Cheviots, about 16 miles away.

I’ve always known it as the Cateran Hole, but even lots of locals don’t know about it.  I hope this information may be of help.

Regards

Nick