An update from London on some of the international stories we expect to develop on Wednesday:
Greek strikes - Planes are grounded and train services halted in Greece as thousands of transport workers join other public and private sector workers in a massive general strike. Read full story
Iran mediation - Iran has agreed "in principle" to an offer by Brazil to mediate its stalled nuclear fuel swap, according to Iranian media reports. Read full story
Volcano disruption - Ash from an Icelandic volcano has shut down airports in the United Kingdom and Ireland for a second day.
Iraq Shiites - Almost two months after national elections, Iraq's two biggest Shiite blocs announced have announced their merger after weeks of negotiations.
UK election - Wednesday is the final day of campaigning before the United Kingdom goes to vote in the closest general election in nearly two decades.