Under the governments Triple lock pension guarantee scheme-those entitled to a State Pension can look forward to a 2.5% this spring. Generous?
Is it time for the BBC Trustees to look at a similar arrangement for BBC Pensioners?
Apply the Triple lock formula (plenty of info available on that) for all BBC Pensioners using the CPI as a benchmark. That figure would then be the pension rise for that year.  
In summary -you get a minimum( maybe more?)  of CPI 2.5% rather than the current actual of RPI 1.6%. The Government would surely be pleased that the BBC is conforming to their CPI ideal. BBC Pensioners would be pleased that their pensions are properly inflation locked.