22/04: Well the 'lady' herself called it "London VOLMET Main", so that's good enough for me.
DC10 - Thanks for the tip, but it's convenient most times to just listen and write in a quiet moment without having to get into another RT conversation with someone. For example I can grab a quick bite of a sandwich while I'm getting the weather. Also, London VOLMET Main has a huge range - out to about 300nm, so we can pick it up earlier which gives us the answers for our descent planning sooner than waiting until our puny RT transmitter was in range of London.
I guess these automated services are installed and transmitted from Swanwick, are they? Does no-one there know about new equipment being installed?