Just an update on this. Amazingly cool, I broke 15 for high 14 and sirpoc was in my race! Had no idea he would be at Battersea. He must have been by far the oldest guy in the B race! Mostly younger runners. I saw him at the start in his usual kit I recognised from the book and for some reason that relaxed me. Kind of cool, someone else posted on Reddit about crushing their pb at Battersea as well in the C race having followed NSM for a low 15.
Afterwards I said hi to him and he seemed incredibly happy for me and laughed at himself and said a lot of swear words when he saw his watch and realised what time he had run again!
My dad took me for years to a running club night, weekends. Unfortunately the coach is quite old school and not that adaptable, but my dad has been under the radar coaching a lot of the runners and as a club they are having huge success. Another younger runner my own age is now jumping on having seen how he was beating me by a minute, to me comfortably beating him.
I'll continue to update over time. Mostly 5k focused but still doing the very much basics of nsm and improving.
Thanks to sirpoc and anyone else who has posted useful stuff over time, there's so many! Was very useful reading cheetodusts posts as he must have so much knowledge and is incredibly fast yet keeps it very simple still.