The jail was designed to hold 318 inmates but the Howard League for Penal Reform says at the end of January, there were 530.
The charity also says the overcrowding leads to more violence and self-harm among prisoners, and hampers their rehabilitation.
Burglar jailed for daylight break-ins
Cash and jewellery stolen
Boardmasters launch main stage competition
Could you be playing?
Exeter child sex offender jailed
Eddie Howard sentence to over four years
Torbay Blue Flag opt-out ‘risks huge tourism damage’
But supporters say quitting the scheme was the right choice
Martin Clunes to open horse festival at Devon County Show
Heavy Horse Festival begins next Thursday
Hopes for extra nurses in Devon with apprenticeships opportunity
Devon to get share of £65 million being spent nationally
