With just 26 days until the election , the Prime Minister is already showing the strain of a punishing campaign trail . At a visit to the Age UK in Plymouth yesterday , David Cameron appeared weary with bags under his eyes and disheveled hair . In one day this week the Tory leader travelled to all all four home nations in his bid to secure votes ahead of the May 7 election . Scroll down for video . Showing the strain : At a visit to the Age UK in Plymouth yesterday , David Cameron appeared weary with bags under his eyes and disheveled hair . He has also had to wade into a number of arguments , defending outspoken ministers , and even got into a muddle over cream teas . On Thursday Mr Cameron was been forced to defend Michael Fallon after the defence secretary claimed Ed Miliband would stab Britain ’ s national interest in the back in the same way he did his brother to gain the Labour leadership . The Prime Minister was also dealt a blow as Ed Miliband overtook him as the most popular political leader for the first time . In a shock result that sent shockwaves through Downing Street , the Labour leader jumped ahead of the Prime Minister in personal approval ratings . Not impressed : Six-year-old Lucy Howarth looked positively uninterested as the Prime Minister read a story at Sacred Heart Primary School near Bolton earlier this week . The Labour Party also took a commanding four point lead over the Tories , according to the pollsters Survation . On Wednesday , Mr Cameron failed to get the desired response from a six-year-old schoolgirl who looked positively uninterested as he read a story to her classmates at Sacred Heart Primary School near Bolton . Yesterday , another campaign gaffe saw Mr Cameron wade into the Cornwall Devon debate about how to eat a scone - getting the two counties contrasting traditions mixed up . The Tory leader has spent the day campaigning in Devon , where he must win several seats if he is to stand any chance of winning a majority . But his hopes of courting support in the county were given a knock with his food faux pas as he chatted with staff and customers of Tea by the Taw on The Strand in Barnstaple , the North Devon Gazette reported . David Cameron , on a visit to Devon this morning , made the blunder of confusing the two methods for eating a cream tea . All good politicians know how to make small talk with voters , but the jam and cream debate is no trifling matter . In an attempt to woo the locals , Mr Cameron ventured : 'When you are in Devon you do the jam and the cream in a different order to Cornwall , is that right ? ' Sensing a gaffe was imminent , he went on : ' I 'm going to get this wrong , are n't I ? ' His prediction was correct , as he added : 'In Devon it 's ... jam first and cream on top ? ' His comments were greeted with silence and stony faces , as the staff realised someone was going to have to put the Prime Minister right .
PM appeared weary with bags under eyes at event in Plymouth yesterday . In one day PM visited all four home nations in bid to secure votes . Turbulent week also saw Ed Miliband overtake him as most popular leader .