Celebrating a career milestone is certainly not unusual for a lawyer. Partners who have globe-trotted, managed offices or built practices from the ground up clearly have plenty to be proud of.

But Chris Parsons wanted to mark 30 years at Herbert Smith Freehills with something different that was relevant to his time at the firm. His choice of party? 30 charity marathon-length walks across India in 30 days.

"India is an important part of what I do," says the country practice chair and corporate partner, who has been in the role for 10 years and lectures at a number of different universities in Bangalore, Calcutta and Delhi. "I'm here for a week or two weeks every month – it has become something of a second home to me.