1. Yes, that's true but that was a few isolated incidents. Nothing of the sort has happened lately.
2. Yes, also true, but still i.a.w. the MSL, i.e. those positions will be allocated according to seniority, the exception being training bases where you start your line training and stay on a little while longer.
3. Absolute nonsense, yes, people were moved from LGW, but the less senior pilots that got to stay and those that were moved in were LTC's, not strictly fair but due to operational requirements. This practice however is a thing of the past now, as the LGW base is now crewed by permanent employees rather than fixed term contractors and as such, UK labour law applies.