Emma Willis has taken to Instagram with an inspiring update for her fans.The Voice UK star and her husband Matt have revealed that they have signed up to become vaccination volunteers, with Emma sharing a snapshot of the couple wearing face masks and dressed in matching green St John's Ambulance t-shirts.MORE: Emma Willis stars with her children in incredibly rare family video WATCH: Emma and Matt Willis' kids play their part during funny Valentine's dinnerShe told her followers: "Today