By Lars Mucklejohn A closely-watched league table has once again named London the tech capital of the world, while Oxford and Cambridge are closing in on New York. The Z/Yen Smart Centres index – which ranks 79 global commercial centres on their ability to create, develop and deploy tech – showed London remained in first place, a title it has held in the biannual ranking since overtaking New York last May. In the latest edition, Zurich rose from fourth to topple New York from second place, which now ranks third. Meanwhile, Oxford and Cambridge rose one and four places to fourth and fifth place…