Cameron played cards right in the North

Mr Cameron, obviously had his tactics decided prior to leaving London to attend the talks.
Knowing f well that the Northern part of the island has been ‘subsided’ more than any other part of the UK, and that all efforts to date to get agreement (Mr Hass etc) had failed, he wisely decided enough was enough - and slapped a billion sterling on the table and said “that’s it boys and girls” and headed back to London with the ‘smoking gun’ - as if to say “ reject this offer out of hand and I’ll fire the gun and we’ll revert to direct rule”. Result - the parties began to realise their little cosy relationship with the Treasury in Whitehall might end and the Executive would be abolished.