Hi Sara98,
If it's similar to the BACF MPL with FTE, I'm assuming it will be; it'll be something along the lines of the following. Out of the interests of fairness I can't give too much away but the following should help.
Bog standard Interview with a representative from FTE.
Aptitude tests with a joystick or something. If you've got any kind of flying or even gaming experience these shouldn't be a huge problem.
Maths, physics, spacial and verbal reasoning written tests.
And the email mentioned a group exercise which I haven't done before.
I have to say I've never experienced the online tests before, not sure if someone like EZY_FR has... I think he's done a Flybe before. Having now done them I found them weird. Be interesting to see how much interest FTE/Flybe take in them.
Also no cost to Stage 3 other than any personal travel/accommodation expenses. As it should be.
Good Luck!