£5 billion revenue company

Official: Cheapest Y everywhere, unless working within 4 hours of landing on a flight longer than 4 hours, when J is allowed. That's from the CEO to the cleaner. Medical exceptions can be made.

Practice: Cheapest Y everywhere for most departments. Departments like mine where people fly a lot (say 10+ long hauls a year) get W when available. BA by default. Very senior management get J under the "work on arrival" policy.

J, and even F, has been allowed when there's a need to travel and no availability.