His great-grandfather, Anthony Bertram, was a novelist, and a maternal ancestor was politician and colonial administrator Sir Evan Nepean, through whom he has Cornish and Welsh ancestry.
Tema vanavanem Anthony Bertram oli romaanikirjanik ja ema esivanem oli poliitik ja koloniaaljuht Sir Evan Nepean, kelle kaudu ta on Cornishi ja Walesi esiis.