For Christians, today marks the beginning of a period of fasting and prayer before Easter. Catholics mark Ash Wednesday by drawing a cross on their foreheads with Ash as a sign of repentance - something that Kay Burnley failed to remember five years ago when commenting on footage of US vice president Joe Biden.
"What's happened to his head?" Burley said. "I'm sure that's what everyone's asking at home...it looks like he's walked into a door!"
She later apologised, saying: "I know now that it is Ash Wednesday and I know that those are ashes on his forehead. I hang my head in shame. I'll be back in just a moment."