Row over tax lays the by-election battleground
The Chancellor George Osborne has joined a global pledge to combat tax avoidance by multi-national firms. The move comes as Labour leader Ed Miliband continues to promote his tax plans which include a 'mansion tax' - a strategy that could put the Coalition under renewed strain.
ITV News' political correspondent Carl Dinnen looks at the battle over taxation:
Read: Miliband promotes 'mansion tax'.
Read: Osborne's global tax crackdown.
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