The IMF is expected to cut its forecast for UK growth in 2012 by 0.3 percentage points this week, from 0.2% to -0.1%, as part of a series of downgrades.
The FTSE 100 has opened up 0.4% on the final day of Q3 trading as Spain's 2013 budget measures helped ease concerns over the country's economy.
Billionaire investor George Soros has said the eurozone crisis will only be resolved when Germany "wakes up" and realises it is to blame for introducing a single currency in the first place.
Greece is understood to have created a working group to assess how much Germany owes it in war reparations, in an astonishing twist to the eurozone crisis.
Germany's economic growth cooled to 0.3% in the second quarter, down from 0.5% expansion in Q1, the Federal Statistical Office has announced in its final reading.
Angela Merkel and Francois Hollande will meet later this week to decide on whether to ease the terms of Greece's bailout package after the country yesterday pleaded for more time.