Reading this thread reminds me that I remember following the GPX track up an unfamiliar road, which made me think, "I don't remember going this way before. We must have a new route. Interesting..."
The road became a Forestry Commission track, which might have been fun if I was better practiced at off road, I wasn't using road tyres and I had my luggage set up for better handling.
IIRC, that was last year.
The wiser riders just stayed on the A466 to Monmouth, which the Forestry Commission track rejoined after a bit of a "fun detour"
So, just a little heads up.
No BC for me this year :'(
Just aiming for PBP and maybe get some of these Cycling UK bikepacking tours in. The Cymru/Porkers double was tempting but I doubt I have the fitness to pull that one off this year so good luck to anyone doing the double.
(or even just one of them for that matter!)