Take a stroll through London's financial district on a normal day, and the dress code is predictable: tailored suits, polished shoes, and briefcases. This week, thanks to the relentless heat wave baking Europe, some workers have been arriving in Speedos. While many people working in Canary Wharf — a purpose-built East London office district home to banks , investment funds, and law firms — have air-conditioned offices, they now have a new option to stay cool. Floating in the shadow of Canary