@DarkMatter I ahven't worked with him in the past (I've basically lost 2 managers in quick succession and he's the interrim) so I don't belive he has a strong opinion either way, although he did say he wanted to retain me.
@GregoryCurrie I don't think complete failure is likely, but the implication of the chat I had with my line manager was that I would likely get more if I waited.