Brown in new by-election challenge
Updated on 28 June 2008
A Labour MP is to quit the Commons, piling further by-election pressure on under-fire Prime Minister Gordon Brown.
David Marshall told local party activists he was stepping down because of ill health - setting up a showdown in Glasgow East where Labour has a 13,507 majority.
The governing party is still reeling from this week's humiliating mauling in Henley, where it came fifth behind the Green Party and the BNP and lost its deposit as the Tories won easily.
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