By Philip Pullella VATICAN CITY (Reuters) -No The Vatican said on Friday it had signed a contract to sell a luxury building, in an exclusive London neighbourhood, which is at the heart of an ongoing corruption trial. Economy minister Father Antonio Guerrero told Vatican media that the Holy See had received a 10% deposit and that the sale of 60 Sloane Avenue in Chelsea should be concluded in June. Guerrero did not give any figures but said the loss on the sale after “an alleged swindle” had been taken into account in the Vatican’s projected budget for this year. The Vatican’s Prefect of the Sec…