Go to western union or money gram. Otherwise open a Foreign currency acct in Standard Chartered.
Another option is a Demand Draft in USD
Western union and Money gram is limited not exceeding amount 1500 pounds per transaction and there rate are so pathetic than open market
Opening Foreign Currency account is not issue but have to deposit amount in foreign currency. bank simply do not convert PK rupees to pounds again u have to go to open market and open market do not deal in large amounts this what i came to know when visited local open currency market in blue-area Islamabad
He is looking for simple solution in which convert pk rupees to pounds at good rates in ONE clean transaction !