Some extra info for you from the Flybe website...
"Before you start
You must ensure that you have the following:
A fully working printer, able to produce good quality printouts in black and white.
The Boarding passes have a bar code which contains all of your flight details. The bar code is scanned at security and before you board the plane. It is very important that your printer is in good working order and can provide a suitable printout. If your boarding card cannot be scanned, re-prints are issued at the airport and are charged at GBP10.00 per person, per sector."