A prominent Pakistani rock musician says a month-long wait for a visa to the UK has ruined a business trip.
Mekaal Hasan told the BBC he had been forced to cancel his air tickets and may have to re-schedule his visit.
BBC correspondents say thousands of people in Pakistan are believed to have been hit by delays in receiving UK visas, with many having to wait weeks.
The UK Border Agency has not commented on claims that this is due to visas now being processed in the Middle East.