The White Cockade is a wonderful tune to sing all sorts too as witnessed in Fred Wedlocks 'The White Cockup' - we regularly do a version at our events where we invite new verses fram anyone daft enough to sing them:-)I also like to do "Chantilly Lace" to the tune of "The Parting Glass". Liz the Squeak does a Christmas Carol to "On Ilkely Moor baht 'at" but I believe that is a genuine Yorkshire carol anyway!
I have yet to find another tune to sing Bohemian Rhapsody to - I'm sure if anyone can do it, Mudcatters can!
Cheers
Dave the Gnome