Charlotte Church - if you feel she's playing up I will happily volunteer to administer a spanking. in fact, even if she has been the height of professionalism I would. I so so would.
As to Sheila Hancock - she's not exactly prolific but she's an award winning actress for her stage roles.
from Wikipedia
Honours and awards
1974 Officer of the Order of the British Empire (OBE) for services to drama
2002 BAFTA nomination, Best Actress for The Russian Bride
2003 BAFTA nomination, Best Actress for Bedtime
2007 appointment as Chancellor of the University of Portsmouth [5]
2007 Laurence Olivier Award as Best Performance in a Supporting Role In A Musical for playing Fraulein Schneider in Cabaret
2010 nomination for an Laurence Olivier Award for best supporting performance in a musical for her role in Sister Act the Musical opposite Patina Miller.