As it looks like fairly new track and they are a new style LERP it could be due to track radius being tighter on one line.That's a new one for me, I've never heard of those before. Many thanks for the explanation! At Yatton they are only on one line so presumably there's only an issue needing them on the down?
Better name as not many go on the end now!Also known as sleeper anchors
Lateral Resistance Plates – Trackwork
www.trackwork.co.uk
Could be due to trying to maintain the platform clearanceThe line is straight through Yatton, so not due to curvature.