You'd be done for begging under the Victorian era Vagrancy Act, which, as suggested, has antecedents dating back to when discharged soldiers were begging.
And there is possibly fraud in making false representations to obtain money. The snag with that is in proving that people gave money simply because of the implied, or even express, representation. An old case involved a man saying that he was a lord whereupon a shopkeeper trusted him to take jewellery against a cheque in payment. It was held that the shopkeeper was selling to the man in front of him not to the fictional lord and thus the claim to be a lord was immaterial to the obtaining of the goods.