Having been made redundant twice (although not from any airline related job), this is how European law works:
In mass (20+) redundancy, the normal procedure is firstly to "let you know your job is at risk, and that they are reviewing all possible other internal vacancies". There is a legal obligation for your employer, together with you and any employee "redundancy consultation committee", to look for other internal job vacancies. Assuming one is not found (never is), you sign the paperwork and you are then out. You should get offered some kind of payoff, together with a legal piece of paper which says you have taken the money and will never come back to claim any discrimination/whistleblowing/etc. They must not replace your job.
The procedure for a one-off redundancy/dismissal is the same, albeit with no committee to back you up and make sure you are not being discriminated. In this case, if you feel you were unfairly treated for whatever reason, you can go to industrial tribunal to claim for lost earnings up to the value of £53,500 (compare this with the payoff/holiday due to you/other money/less legal costs).
Constructive dismissal, or whistleblowing can net you a much higher payoff. So if you were effectively forced into a position where you had to quit, or if you have any dirt on them which meant they wanted to get rid of you, you can get more.
On your specific points:
1) Once you are legally gone from the company, you are gone. They have no obligation, and may indeed want to shy away from you in case you hold a grudge/have turned psycho.
2) No. See above.
I am no lawyer, but this is how I understand it. Good luck!