Apparently you wish to make "C" redundant and may well replace it with something else.
I should point out that "C" has now been in continuous employment for umpteen thousand years and the redundancy pay could be astronomical. Also, should you replace "C" with something else then "C" is not actually redundant is it. If the job of "C" is still open and you stop using it then that constitutes unfair dismissal and "C" will sue your ass off.
If you are unable to pay when "C" sues your ass off I Will be forced to throw you in the Cells ( with a capital "C" !! )