Sitting on the sofa in his flat in Walthamstow, north-east London, with his dog Pingu by his side, Chris Woodhead is trying to find space to add another tattoo to his already crowded body.

“There’s an increasing number of tattoo artists who love to not only fill empty space but use body lines in a more creative way,” adds Kang. Kang recommends creating at least a seven-inch ...