The OECD's gloomy forecast for UK growth in the three months to the end of March comes after official figures revealed the economy contracted by 0.3% in the final quarter of 2011.
This was worse than the previous estimate of a 0.2% fall.
The OECD also warned the recovery for the world's biggest economies would be fragile, with the outlook for Europe "very weak".
More top news
Nick Clegg has sent a campaign leaflet to his constituents with no Liberal Democrat logo and minimal mention of the party.
Rain continues to move eastwards in the south tonight, the north, frosty with the clear skies.
Daily Dose, a short summary of the day's election campaign stories.