At my meeting with Mr Zapatero, the prime minister elect of Spain this morning, both of us agreed that unity and solidarity in the face of terrorism was the only possible response.

BBC: NEWS | UK | Politics | Blair's speech in Lisbon

They got a glimpse of a different Kenya, displaying a spirit of unity and solidarity that, to those old enough to remember, brought back the days when Kenya won its independence 35 years ago.

ECONOMIST: Kenya

The Scottish Socialist Party, rival left-wing party Solidarity, the Scottish Senior Citizens' Unity Party and UKIP are also contesting the by-election.

BBC: PM's wife joins by-election trail