Dan Walker hasn't had the best start to his week after suffering quite the wardrobe malfunction on Monday morning.Just moments before he appeared live on-air, the BBC Breakfast presenter realised he had yoghurt on his tie while his co-host Louise Minchin was more worried about the state of his hair.MORE: Louise Minchin leaves fans in stitches with 'lockdown 3 hair' photoWATCH: Louise Minchin is reunited with Dan Walker on BBC BreakfastSharing a snap from the red sofa, Dan told his social media