Air Atlantique / Atlantic Airlines have been sponsoring pilots through commercial training for years. Minimum requirements are not set in stone but usually are a Private Pilots Licence and about 100 hours. I believe sponsoring new people is on hold at the moment but the person to speak to is Pete Humphries who can be contacted at:
Atlantic Flight Training,
Dakota House,
Coventry Airport,
Warwickshire,
CV8 3AZ.