From MD fire drills and scavenger hunts, to cupcakes and trading chocolate bars – this summer, London's investment bankers have been getting creative in raising money and awareness for good causes.

At Credit Suisse, junior bankers turned up the heat on their superiors earlier in August by pitting managing directors head-to-head to test their pitching skills, raising money for the Swiss bank's charity of the year, the National Society for the Prevention of Cruelty to Children.