Chasing an R1 - Oulton Park - Track Day 21/04/21 - Novice Group

My dad's 6th session at Oulton Park. I was ahead of him until we over overtaken by a fast guy on a R1. My dad decided to pursue!
Me dad was on his '16 BMW S1000RR and I'm on a '04 Yamaha R6, both with road tyres.