Virgin Atlantic announced Monday that it has made firm orders for twelve wide-bodied Airbus A350-1000 jets, worth $4.4 billion (3.9 billion euros) at list prices, in the first major announcement at Farnborough.The airline added it would purchase eight of the jets for deliveries starting in 2019, and four new aircraft on long-term leases from (leasing firm) ALC from 2020.Airlines typically negotiate big discounts on large aircraft orders so the actual value of the deal is likely to be smaller.