Two prisoners have been found dead in their cells at separate jails in England, the Prison Service confirmed.

Inmate Peter Done, 28, was found hanging in his cell at Lincoln Prison at about 1500 GMT on Thursday. He had been arrested for a breach of licence.
Earlier that day, Virgilio Villanuaua Mallari was found dead by prison guards at Holme House Prison in Durham.
The 39-year-old man, from the Philippines, was awaiting trial for child sex offences.
'Terrible tragedy'
The deaths bring the total deaths in custody this year to 88, according to government figures.
A Ministry of Justice spokesman said: "Every death in prison is a terrible tragedy affecting families, staff and other prisoners deeply.
"Good care and support from prison staff saves many lives in prison; more lives are saved than lost. "On any one day prisons keep safe over 1,500 people assessed as at particular risk and many hundreds more have been helped by the care and timely interventions of staff."