Hey BadMojo,  I'm in the same boat.   Heard nothing since I left in 2017. My Union Rep told me to ignore any correspondence, because there was thousands of engineers they'd have to go after before me, besides he'd never heard of them chasing up Engineers for the so called 'bond' as Centrica don't have a leg to stand on (I wonder if we have a case against the union).   Centrica also took my final wage, leaving me in financial dire straits, fortunately I managed to borrow