Oh no, mccfluff ... what did you do ?
There's a stone on the wall shaped like a rectangle (yes yes, I know they all are ... you'll have to find it).
The stone is loose.
Behind it, you'll find chocolate, a chisel, a John Bull print set to make false papers, some clean (ish) underwear, and some Euros to bribe the guards (they don't accept GBP any more).
We'll wait for you near the big tree beyond the perimeter fence at 2100 hrs each night until you get out.
I lost an Alice band and a pair of espadrilles when I was last in there. Be a darling and keep an eye out for them.