FlyingL
Thanks for your reply and apologies for my laziness.
Your quotation contains a very important point:
It is also important to recognise that non-wage costs are likely to have as much bearing on airline management decisions on location decisions as direct wage costs.
i.e. airlines that have choices about where to pay (and perhaps base) personnel are more likely to choose low non-wage cost locations such as the UK in preference to e.g. Belgium or Germany.