Happy Valley 's actress Sarah Lancashire appeared to 'breach' BBC guidelines over an advert she did for Yorkshire Tea . The actress, known for her BAFTA-winning role as police officer Catherine Cawood, found herself in hot water over an ad. After three series as the headstrong copper with a past, Sarah 's newest gig as a security guard in the Northern tea's commercial appears to have caused a ripple concerning the public service broadcaster and its super strict guidelines on mimicking their