Stewart married Roisin Witort in Ireland on 29 July 2016. OSs in attendance (from left to right): Stewart Boyd (Bruce 98), Jonathan Legge (Bruce 98), Fay Davies (Lyttelton 98), Serena Holtom (née Thynne, Nugent 98), David Wills (Grafton 98) and Hugo Gordon Lennox (Chatham 98).
