While it may have come as a shock to many in the city, Simon Dingemans move to GlaxoSmithKline is characteristic of a man known for making deals against the odds.

Fiercely intelligent and notoriously uncompromising, Dingemans is regarded as one of the square mile's leading rainmakers, and has been involved in investment banking for 25 years (allegedly entering corporate finance the day after the 1987 crash).