One has to smile reading stuff like
CAA Director of Airspace Policy, Mark Swan, explained: “Extending B-RNAV to lower levels of controlled airspace will mean that aircraft will be able to fly with greater accuracy and enable us to make the changes to the UK’s airspace structure that are needed to ensure we maintain a safe and efficient system for all airspace users.”
BRNAV is RNP5.0. One could fly within 5nm by following the M25
BRNAV is a boat which left the port about 15 years ago. Still, he's probably a very good accountant.