Our Latest Aircraft -- The "Vickers Viscount" being inspected at Northolt airport today. British European Airways has opened negotiations with Vickers-Armstrong Ltd. for the purchase of a number of Viscount V-700 commercial aircraft - one of the most outstanding aircraft flying today - it was announced at a luncheon at Northolt Airport today. The Viscount is expected to be the first airliner in the world powered by "prop-jets" to go into service on an airline The first of them landed at Northolt