FWIW, I was LHR based for the vast majority of my career before retirement, and flew the A320 family for over 4 years, the rest of my career being on Boeings 737 and 747..
I recall being very happy in the LHR regime of 210, 180 and then 160 to 4dme on all types I flew.
The only times it caused concern was on the A320 in very strong headwinds when reaching 4dme at 160 and pressing managed speed resulted in a speed increase on occasion to 170+,
I learned from that and whenever another aircraft was close ahead - usually, used selected speed inside of 4d at an appropriate value - you won't fall out of the sky!