Kelsey Calvert, 28, also pleaded guilty to a charge of carrying a prohibited article by bringing codeine into HMP Holme House, a category C men's prison in Stockton-on-Tees, County Durham.

Calvert, from Ryhope, Sunderland, sobbed in the dock at Teesside Crown Court on Friday.

The court heard she admits an offence of misconduct in public office by having an inappropriate relationship with an inmate on and before 22 November 2022.

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Judge Richard Bennett adjourned the case for a pre-sentence report and told Calvert she is set to be sentenced on 4 October.

She was granted unconditional bail until then.