Who Else Knew?

If, as reported on the BBC, the donations have been going on for four years, and Peter Watt has only been General Secretary of the Labour Party for under two years, then who else knew about the donations funnelled from David Abrahams's.

The previous General Secretary of the Labour Party was Matt Carter who, according to the always correct Wikipedia, organised the legal aspects of loans from individuals to the Labour Party that were central to the Cash for Honours political scandal. Did he know anything about the set-up or was he ignorant of the deal?

Update I. BBC reporting a further 200k of donations found through Mr Abraham's solicitor.

Update II. Lib Dem Voice reports that Peter Watt must have known the rules.

Update III. Comments on Guido indicate the matter is now going to the Police.

Update IV. Now it seems Harriet Harman trousered 5K from Mr Abraham via a similar arrangement. Hilary Benn received 5K direct from Mr Abrahams