DOUBTS over the ability of EU leaders to deliver measures to ease the region’s debt crisis triggered a 2.5% slump for London’s leading shares index.

With a meeting of 27 countries in Brussels unlikely to produce a concrete plan to deal with the fall-out from a Greek exit from the euro, the FTSE 100 Index gave up all of Tuesday’s gains to close 136.9 points lower at 5266.4 last night..

Fears over China were also to the fore after the World Bank cut its economic growth forecast for this year.