My friend Chris Walker, who has died of pneumonia aged 66, worked as a GP in Sheffield for more than 30 years, first at the radical practice in Darnall, then at Park medical centre until his retirement in 2014. He developed a special interest in working in the fields of drug rehabilitation and migraine.
Chris was born in Epsom, Surrey, the second of four children of Emma (nee Lewis), a nurse, and Derek Walker, a psychiatrist. The family moved to Painswick, Gloucestershire, and Chris went to Wycliffe college, then on to study medicine at Sheffield University. After graduating he travelled with friends overland to Africa in a self-assembled Unimog vehicle that resembled a mini-tank.
