Oh nooooooooooo!
Looks like this thread is heading straight back to where it started.....deep breath....but I would like to advise that if the notice was not written by ATC/CAA, it is not official. Suggest 121.5 is the way to go on a Mayday call, after transmitting on one's current in-use freq. But practice Pans? Well, read all the preceding stuff, mine included, and decide for yourself.