"Payment holidays" are a red herring
In the context of a pension fund such as BA's various schemes, so-called "payment holidays" are a red herring. The various Co.s that have taken payment holidays may have saved them selves a few million.
That is LESS than the rounding errors that the actuary uses to cost the liabilities.
Payment holidays for BA were few and far between, and as CM points out, at least one of them was due to Mr G Brown's laws.