But my proposal for this year will not only help those on low incomes who lost out, but also does more to help all basic rate taxpaying families at a time when oil and food prices have been rising in every part of the world.

BBC: Full statement: Tax changes

Former BBC journalist Mr MacShane, who had been MP for Rotherham since 1994, said the British National Party had run a "three-year campaign to destroy my political career, " but thanked his supporters for their help.

BBC: Denis MacShane expenses privilege claim queried

"This hasn't been an easy decision to make but, with the help of my family, I feel it is the best decision for my career, " added Johnson.

BBC: Damien Johnson calls time on Northern Ireland career