With poor sales and a plummetting market share, the BlackBerry Passport could be the Canadian smartphone manufacturer's last throw of the dice - and it's a brave one.

The Passport represents a complete departure from anything that's come before it in the smartphone space, with an unusually wide, square-screened design and enlarged keyboard.

But is being brave enough to bring BlackBerry back from the brink? We sought the opinions of people in London's financial district to find out.