ILS OTS
Locked Door...
Do they never turn the ILS off at LHR when required for maintenance?
Airport authorities don't just switch off ILSs for the fun of it, there is always a good reason for it and coordination is done with ATC if possible.
The flip side is to not use a perfectly good 11,000 ft runway in gorgeous summer wx because the ILS is OTS. Then you have the lowered flow rate and delays to contend with.