From memory, report time is around -80 however depending on the terminal however the report times prior to trips will be changing with T5. The actual flight time doesn't really matter when it comes to rosters, it's the report time that you need to work to. You should generally arrive a good 20 minutes before your report time. You can commute in uniform, in fact you are not allowed to check your uniform into the hold, you either carry it, or wear it. National Express will give you a coach card when you get your staff ID, you will receive a discount but it's not a huge amount. Most airlines will offer staff travel after 6 months.