Left wing bias or an accident?

Look at the picture that the Guardian chose for Angela Merkel, the Christian Democrat Leader who just won 225 seats in the Bundestag. (Chancellor Gerhard Schroeder won 222 seats).

http://www.guardian.co.uk/germany/article/0,2763,1573570,00.html

Is this bias by a left wing British daily against a Conservative Politicican or is it just an accident?

I would posit that this is a clear case of bias to paint a conservative politician as unflatteringly as possible.