London, Apr. 10 : A party of 50 cricket-loving explorers departed Lord''s yesterday for an unusual tour. In 11 days'' time, after flying, driving and finally trekking to a plateau 5,000 metres (17,000 ft) up in the Himalayas, more than three miles above sea level, they will play a match of Twenty20 cricket and set a world record: the highest altitude recorded for a field sport.