Left-arm fast bowler Afridi suffered the injury in Sri Lanka last month and was ruled out of the ongoing Asia Cup in the United Arab Emirates despite being named in the preliminary squad by the Pakistan Cricket Board (PCB).

"Shaheen Afridi requires uninterrupted, dedicated knee specialist care and London offers some of the best sports medical and rehabilitation facilities in the world," PCB chief medical officer Najeebullah Soomro said in a statement on Monday.

"In the best interest of the player, we have decided to send him there.

"The medical department will receive daily feedback on his progress ... and we are confident Shaheen will return to full fitness before the ICC Men’s T20 World Cup."

A medical panel would determine when Afridi would return to competitive cricket, the PCB said.

Beginning on September 20th, Pakistan play seven Twenty20 Internationals at home against England before flying to New Zealand to play a tri-series also involving Bangladesh.

Former champions Pakistan begin their Twenty20 World Cup campaign with an October 23rd blockbuster against arch-rivals India in Melbourne.