This occurs when you slip through multiple status levels in one year. From what I can see above you just need 130 TPs to get to Silver, via any oneworld flight(s) or on a BA codeshare(s).
EDIT: Belated, but welcome to Flyertalk and the BA forum mr_peterson, please keep tuned this website for how to make the best use of BAEC and BA. Welcome on board.
Last edited by corporate-wage-slave; Oct 28, 2017 at 10:55 am