The company wide email didn't specify, but particular areas we were told in breifings (if i recall correctly?!?) about where Asset Engineering, ESD H24 centres engineers and ATSAs.
I can't talk for the ops areas affected, but for AE we have seen a lot of LTIP resource demand slip to the right into CP3 to make CP2 costs drop. Hence now the headcount is higher than forecast demand. Hence the voluntary redundancy request in our area - I assume the ops areas are due to expected reduction in demand due to centre merging and new system introductions, but that is only an assumption.
RS