If you go to the Law Society's website, and 'Find a Solicitor',
http://www.lawsociety.org.uk/choosin...asolicitor.law
you can select to search by area of practice, and by region. Select 'Employment law' and that gives a list of firms that specialise in that field. You could also try 'Aviation law' but I don't know how relevant that would be.
Even if it doesn't help you out much, I'm sure anyone you contacted would be able to point you in the right direction.
Hope that helps!