Bishop of Southwark asks Government about Covid vaccinations for prison inmates and staff

On 16th December the Bishop of Southwark asked a question in the House of Lords during exchanges following a question about prisoners with Covid-19:
The Lord Bishop of Southwark [V]: Your Lordships will have heard me mention that there are five prison establishments located within my diocese. In respect of one of them, will the noble Baroness join me in paying tribute to the governor of Her Majesty’s Prison Wandsworth, Graham Barrett, who was awarded an OBE in the Queen’s Birthday Honours List for his sterling efforts during the Covid pandemic in keeping infection rates so low in the jail—and indeed to all Prison Service staff recognised in this way for achieving so much in such challenging circumstances?
As the noble Baroness is aware from the previous supplementary question, out-of-cell activity in many establishments is now limited to one hour or less in 24. Can she assure the House that such provision will not slip beyond the 24-hour period into longer periods of confinement, which happens when the 24-hour period is variable?
Will any priority be given to rolling out the vaccine to inmates and staff?