By Monica Charsley A dad who recorded Kate, Princess of Wales and Prince William on the weekend has rejected the “ridiculous” claims that it wasn’t really her in the clip – and said “excited” staff also recognised her. Nelson Silva, 40, captured the moment Kate stepped outside for a quick trip to the Windsor Farm Shop on Saturday, as she walked side by side with William. The video sparked numerous conspiracy theories about her whereabouts, with many claiming the recording was of Kate’s lookalike instead. But the father, who was out shopping for steak when he saw the royal couple, said the soci…