Not just Emirates: also check out Etihad in the Middle East, India & China in general, as well as the general expansion in the UK.
Jobs for the new guys, opportunities for FOs to fast track & DECs for suitable FOs & captains, not to mention the training opportunities!
However, GBs management have never been the type to pre-empt a situation, preferring to wait until half the work force have resigned before they do anything about it.
Apparently GB have had some 10 resignations in the past couple of weeks, amounting to some 5% of the pilot workforce, with more in the pipeline.
Wake up!