I have been working at this company for almost a year now, and I have been offered a promotion and training to go with. My old job here will be cut, that is part of the reason why I have been offered this one, so they can keep me on. This job was created for me. This means I have to take it or leave.
Meanwhile, I have been studying for university entry into a completely different field (engineering) than the one I have been offered a route into (HR). I have passed all exams well enough to have secured a fully-funded scholarship including living expenses starting from September.
My dilemma is that I will be leaving in September to take up full-time study, but I feel for the people that put in so much work to allow me to stay. Should I open up about my plans? Should I allow things to proceed, hide my plans, and hand in my notice when the time comes?
I am afraid of becoming jobless for the upcoming 8 months, but I don't want to screw these people over - training is expensive!
What would be the most ethical course of action here?
EDIT:
Thank you for your answers. My question is not just a case of 'should I tell my employer that I am leaving?'. It is more like : 'Should I undertake a new role and training regardless of the fact that I will leave?'. Sorry if that was not clear. This question was not a repeat of others.