Although they do a stirling job using the facilities they have (not a lot) the service is vastly overused and abused by the average PPL and as such is liable to be swamped on a busy summers day. I think the user therefore has to accept some responsibility in how they use it. So - next time you are thinking of calling them maybe it's worth asking the following questions first:
Are you opening or closing a flightplan?
Are you after danger area activity information?
Are you after an airways joining clearance?
Are you after some weather information for a distant airfield?
Are you flying over a desolate or uninhabited area (English Channel / Mid Wales for example) where no other ATC services are unavailable.
If the answer to any of the above is no then do you really need to call. The answer to that is really no again.
There are plenty of other frequencies you can scream pan or mayday on around the country if need be. Leave London Info for its job, not as a pseudo ATC, because as you clog them up it stops them doing the job they're there for (the ones listed above).
CM