Viscounts on the corporation's Heathrow–Manchester and Berlin routes. By 1969, BEA carried 132,000 tonnes of freight each year. That year, it also opened a new cargo centre at Heathrow, which it jointly operated with BOAC. To cope with increasing amounts of air freight, it began replacing its nine Argosy freighters with the same number of Vickers V.953C Merchantmans, which were converted V.953 Vanguard passenger planes. Aviation Traders Engineering Limited (ATEL) of Southend converted the first two of these while BEA's inhouse engineering department converted the remainder using kits supplied by ATEL. In its 1969–70 financial year, BEA's revenue from ticket sales was £126 million resulting in a profit of £6.5 million, almost twice the previous year's and the biggest in the airline's history until that time. In its 1970–71 financial year, BEA carried 8.67 million passengers at an average load factor of just over 54%. During that period it employed just under 25,000 people, revenues totalled £133 million and the operating loss stood at £780,000. On 18 February 1971, BEA received its first Trident 3B. Commercial operations began on 1 March of that year on the airline's Heathrow–Orly route. On 31 October 1971, BEA operated its last scheduled service from Heathrow to Le Bourget, marking the end of 25 years' continuous operations by the airline at the historic Paris airport. This move was necessitated by the Anglo-French bilateral air treaty to make room for British Caledonian's Gatwick – Le Bourget service, which began the following day. This in turn resulted in all of BEA's Heathrow–Paris flights exclusively using Orly from then on. In early-December 1971, BEA bought both of Channel Airways' Trident 1Es for use by the airline's Channel Islands Airways division and Northeast Airlines on mainline routes from Birmingham and regional routes from Newcastle and Leeds/Bradford respectively. Together with the ongoing Trident 3B deliveries, this additional Trident purchase would bring the total number of Tridents in BEA's fleet to 67, making the type its most numerous jetliner. 1971 was also the year BEA underwent a major reorganisation under its then chairman Henry Marking entailing the establishment of 10 divisions that were meant to act as profit centres. These were BEA Mainline BEA Cargo Super One-Eleven Scottish Airways Channel Islands Airways BEA Helicopters BEA Airtours British Air Services Travel Sales Sovereign Group Hotels. BEA Mainline assumed responsibility for all of BEA's Heathrow operations other than those to and from Manchester,