Back Office - Operations, Pay-roll, HR etc. EU law applies across both legal entities albeit with sufficient subtle differences to mean that local presence of some sort will still be required. So not alot of scope to consolidate there then either.
I may be wrong but I seem to recall from my time working in Spain, that under Spanish contract law there were 14 pay days a year; 12 + 2 bonus. Also, if you left or were dismissed (for any reason) then a healthy lump sum became payable. That was back in 2003. Unless things have changed, I can see the BA staff wanting to consolidate some of that.
