McDonald’s employee 75 year old Muriel Haggerty at work in Sunderland’s High Street West restaurant. See Ross Parry story RPYMAC; Britain’s oldest female McDonald’s worker has celebrated her 75th birthday and is still lovin’ it – eating there EVERY day. Great-grandmother Muriel Haggerty is the eighth member of her family to work at the fast food chain – but only started working there when she was 60 and hated retirement. Having left her job in a factory, she decided to apply as a customer care manager in the chain’s Sunderland city centre restaurant and has been there for the last 15 years. She says she eats the fast food every day and will even go in on her days off. Her favourite food is the pulled pork wrap, which was recently introduced to the menu.