London information are just that a great information service for anything you need to know.
I have called them while 200 miles away over France to get some info I need!
They are also good for getting clearances into CAS etc.
Where you are in areas where you cannot get a RAS they are the next best thing as its better to be in contact with someone rather than no one.
They will give you info on known traffic but not the sort of traffic separation available from a radar service.
But they know everything probably even the best restaurants at your destination (only joking)
Not very long ago I had a very odd radio problem loosing contact with approach and tower into a busy airport on an instrument approach.
Nothing worked so while dialing in 7600 tried London Info who strangely came in loud and clear! explained the situation and used them as an in between.
Love them!
Pace