When busy senior executives consider the next phase of their careers, they often look forward to a more relaxed existence full of worthy charitable roles and perhaps a cushy NED seat.

But for Guy Rigby, one of the seats in question is in the rather more extreme setting of a 24-foot transatlantic rowing boat, as he looks to become part of the oldest pair ever to row across the Atlantic Ocean.

Mr Rigby, who founded Smith & Williamson’s entrepreneurial services group in 2008, will next year take part in the Talisker Whisky Atlantic Challenge, a fundraising event which sees teams row non-stop across the 3000-mile stre...