In December 2018, Kerslake revealed that he was battling prostate cancer, saying that "the doctor gave me about eight months to live". He further stated that five years previously, he had been given four years to live. Kerslake's further health complications include psoriasis, psoriatic arthritis and two heart murmurs.
Kerslake revealed that it was his final wish to receive the platinum album certifications for the Blizzard of Ozz and Diary of a Madman albums that he had worked on, and Osbourne granted that wish. Kerslake wrote a letter to Osbourne, informing him of his ill-health and desire to receive the records. Kerslake subsequently received his platinum plaques.
On 14 December 2018, Kerslake joined Uriah Heep on stage at the Shepherds Bush Empire, contributing percussion and vocals to "Lady in Black".
On 19 September 2020, Kerslake died from cancer at age 73.
Kerslake was born in Winton, Bournemouth, Dorset, England. At age 11, he began playing drums and got his first professional gig with the Gods in 1969, going on to record three albums with the band. He later played with Toe Fat and National Head Band before linking up with Uriah Heep in November 1971.