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van der Kleij said: "The challenges that Shoreditch and central London have around power and connectivity are not a problem here because it's a well planned city."
He added: "We're not trying to copy anywhere else. We consider ourselves to be very complementary to Tech City we consider ourselves very much part of that." With 7,000 tech workers at Canary Wharf, "that already makes it a pretty dense cluster," according to van der Kleij.
Pictured above is the 'business club lounge' of Level39.
Darren Armitage, head of technology innovation at HSBC, said: "Large organisations sometimes have a blind spot around small companies and having them on the doorstep makes it easier to get them into meetings with executives."
Above is one of the meeting rooms with views over Canary Wharf - and the obligatory sweets to refuel entrepreneurs during those long brainstorming sessions.
Alastair Paterson, chief executive of Digital Shadows, an online monitoring service for confidentiality and compliance which has been in Level39 since January - and whose previous offices were above the meat market in Farringdon - described the facility as "a one of a kind".
Each of the meeting rooms has some artwork on the walls - this one features an image of Steve Jobs.
Images: Steve Ranger/ZDNet