Britain said on Monday it had revived diplomatic relations with Iran and appointed a non-resident charge d'affaires, two years after an angry mob ransacked the British embassy in Tehran.
The announcement reflects a thaw in relations with the West and comes after Iran and six world powers, including Britain, came close to a preliminary agreement about Tehran's nuclear programme at the weekend.
Britain's Foreign Office said Ajay Sharma, currently the head of the ministry's Iran department, will take up the post immediately.
More top news
Friday will be largely dry with a mixture of cloud and some sunny spells, the best of these in the morning.
Thousands of cancer patients are dying in hospital every year against their wishes, according to a new report.
The Cancer Drugs Fund, which cost £1.27 billion, didn't deliver "meaningful value" to patients - and even put some at risk of side effects.