Trust what 250kts is saying.
10 years ago, the T&G members at Luton airport (security, admin, terminal staff) accepted new Terms & Conditions for new starters whilst retaining their own conditions. A hatchet man was employed to attack all T's & C's, he and his henchmen did their 'dirty work' then bu@@ered off to do it again for another business elsewhere in the UK.
9 years later, only a handful of 'Old Terms & Conditions' staff remain on the payroll. Staff turn over in manual grades is higher than in ATC, but for those ATCOs with 10 years or less service currently, by the time they reach their late 40's, they will be a minority work force and as such powerless against what the 'majority' want or are forced to have!
Please, please please trust what 250kts is saying.
Personally, I get delayed regularly by the European ATCOs going on strike. Good on em' if they can retain what they have.
If it takes strike action, I will back you guys all the way!
I am an ex union branch chair of a 'sister trade union'.