had a quick search through the website on Eployment Income and it is possible if it is pre-agreed but not certain. Have a look at :
http://www.hmrc.gov.uk/manuals/eimanual/EIM01235.htm
it starts going into case law and as I have no sponsor and want to be a pilot not a barrister I'm going to leave it at that. Perhaps there is someone out there on the other forums who has successfully been through this.
Good luck the lucky few