For those, like me, that use the Sky UK (or Sky Ireland) providers and can decrypt FTV, "London Live" used to be provided as channel 117 even though a real Sky box would only provide it for those in the London area.

Now that 117 is, in most cases, taken by "BBC Three" this doesn't happen anymore.
I'm not sure what happens for Sky Ireland. Last time I checked it didn't seem to have "BBC Three" at all.

In the London area Sky still puts "London Live" at 117 and puts "BBC Three" at 173.

How about changing ABM so that Sky UK, when outside London, provides "London Live" at 173?
173 doesn't seem to be used for anything else at present.

As for Sky Ireland, I think it ideally ought be provide both "BBC Three" and "London Live" with channel numbers.
I'm not yet sure which numbers to choose though.