We are told there are 650 seats making the winning cut off at 326. If we take the 5 Sinn Fein seats away (they always abstain) and a further 4 which include the Speaker and his three deputies who are traditionally neutral, we have a new overall majority figure of 322.
Lib, labour and the 9 Nationalist MPs add up to 324 whereas the Tory 306 plus 7/8 Northern Irish MPs only make 314 max.