For those querying laundry - every function you do in your house, washing, drying, washing up, cooking is a 'prison role' - the majority of prisoners have to work or they get in to trouble (loss of income, loss info visits etc)
So certain wings have certain wash days, you leave it outside your cell like you would a wheelie bin on the street, and the laundry prisoners pick it up, under supervision, wash it and dry it and give it back. they then get paid their £10 ish a week.
This goes for all functions listed above, and more. Some prisoners work in 'garment making' so in women's prisons they make those shitty grey joggers and hoodies for men, they get bagged up and sent to male prisons.
All roles are very manual, very repetitive and you can only change with permission ..... the best job is the library, the older prisoners generally get that, sitting and giving out books and delivering books to those who are not allowed out their cell (think Shawshank!!)