By Bradley Jolly A Princess of Wales lookalike has hit out at “crazy” speculation that she is in the footage with Prince William at Windsor Farm Shop instead of Kate. Heidi Agan, who has impersonated the royal professionally for 12 years, stressed she “100 per cent” believes Kate and William are in the footage \- because she, at the time, was doing her “other job” – as a teacher at a dance and musical theatre group. Heidi told the Mirror how her social media went into meltdown at the suggestion she had been wrongly mistaken for the real Kate, 42, when the future queen was snapped at Windsor Fa…