I do believe what dooms the coalition could be a rather lengthy list:
Increased taxes on port and brandy
A national sun dried tomato shortage
An MP child slavery scheme uncovered
Thatcher pulls off her Cameron mask accidentally when trying to rub the creases out while at the dispatch box
Rupert Murdoch plans for a laser 'opponent dispatch system' on top the the still-to-be-finished Shard in London
The ongoing and ever increasing pub closures finally hits the House of Commons bar
Toffs finally crack and move from fox to 'ASBO' hunting
A policeman loses a contact lens during a student protest, leading to a breaking out of the shotguns
(Monchberter Can't go wrong with Doom, Sun 26 Dec 2010, 8:39, Reply)