LONDON | July brought fewer travellers to the five British airports of BAA, the operator owned by the Spanish company Ferrovial. BAA said 9.6 million passengers passed through its airports in July 2012, down -4.1% comparing to the same month in 2011. The drop in numbers at Heathrow was of -4.4% to 6.6 million passengers. The loss was more pronounced in the second half of the month. The consortium explained in a…