Penny Walker 7 April 2021 External publications, Stakeholder engagement Seeing a familiar face, even if it's behind a mask Penny Walker 7 April 2021 External publications, Stakeholder engagement “Oh, Penny, I’d heard you were volunteering here!”The woman behind the mask, arriving for her Covid vaccination, is a near neighbour, as is one of the other volunteers on this shift. At our local vaccine centre, you never know who you might see.