Bombardier Aerospace announced yesterday that Exeter, UK-based FlyBe has converted four options on the Bombardier Q400 turboprop airliners to firm orders. The contract is valued at about $100 million. Delivery of the four aircraft, coupled with the order for 20 Q400s announced January 27, will increase FlyBe’s Q400 fleet to 45 aircraft. Yesterday’s contract increases orders for the Q400 to 151 aircraft. FlyBe and Bombardier have agreed to jointly promote the Q400 in the UK and Europe.