It seems that NATS are retreating from the use of NDBs generally. The HRW NDB at Hounslow Municipal has been u/s for over a year now, and has been NOTAMd to be so until the end of the year. If no-one complains, it'll be withdrawn as a waste of electricity and rateable value.
I wouldn't wonder that LGW is just the same, particularly as NATS have to pay rent for the ground they're planted in.
With GPS, triple INS, and MLS coming in , the only use for ADF is listening to Richie Benaud and the Ashes.