Agree with the comments re London ATC. In excess of 95% of our approaches are logged as within a constant descent profile criteria established by NATS. Approach always give accurate track miles to run when leaving the hold which allows descending onto the glide without levelling off, creating noise and burning excess fuel.
Its amazing to watch it all on TCAS, they are amazing and never seem to get stressed out. All that with 2.5 nm sep, parallel runways and with 20nm of two other major airports.
Pity the rest of Europe arent as good.