my plausible solution... If ATSS vote yes, then the whole thing might only need a tweak, perhaps RPI +1% pensionable (or max payrise will be RPI +1%), limit cap to 10 years, improve the protection for those employees post PPP and write in 'if we wish to sell NSL off during the 10 / 15 years, you will all get a large bung'.
That to me doesnt seem like a too big a step...
LOA
ps they could sort out banding too!!!