Prime Minister Vladimir Spidla asked the junior coalition partner - the right-of-centre Freedom Union - to give up its three cabinet posts on Monday, amid a deepening political crisis in the country. The crisis began on Friday, when a Freedom Union MP - Hana Marvanova - went against her party and voted against government-proposed tax reforms, raising questions about the stability of the coalition. Rob Cameron has been following the story, how did this crisis happen Rob?