International observers have condemned Zimbabwe's presidential election after Robert Mugabe secured a controversial fifth term in office.

Commonwealth and Southern African Development Community observers are expected to reject the poll as having "failed to meet key, broadly accepted criteria".

Results show Mugabe to have secured 1,634,382 votes - substantially more than the 50 per cent needed for victory. Opposition candidate Morgan Tsvangirai received 1,170,590 votes.

Jack Straw yesterday told MPs that any evidence that Mugabe had stolen the election would have "enormous implications for the nature of our relationship with Zimbabwe".