Microwave Landing System (MLS)
 

Does anyone know of any place on earth that has an active MLS approach? If so, where and who uses them (meaning commercial, air transport ops, etc.)?

Thank you.

Heathrow, according to this nine-year old article. Unless they've decommissioned it since.

Still up and running at LHR, in occasional use by BA, for no other reason than nostalgia as I can see 😄

Is Heathrow the only location in the entire world the MLS is used?

MLS was commercially killed stone dead years ago, with the advent of IRS/FMCS systems updated by GPS/DME/whatever, with WAAS/SBAS/GBAS enabling all the goodies of MLS (curved/offset/segmented approaches, steeper low noise etc) with nil on-airport infrastructure and no "special" aircraft equipment, given the usual avionics fit for most larger aircraft since late 1980s.
Tootle pip!!

AFAIK, it's only operational on the BA shorthaul Airbus fleet (don't know if it's on their latest Neos).

Thread from last year: PPRuNe: What Happened to the Microwave Landing System?

NASA