Thank you for staying in Keystone House London.
The lockers are located in every room, especially shared rooms. We have also started renting out safe deposit boxed at reception to provide a more secure storage of valuables available to all guests.
Seeing you haven't been given a bed number I believe you were staying in a 4-bed dormitory. From our experience allocating beds in small rooms and keeping it on a first-come first-serve basis, latter has turned out to work better. As for larger rooms, we kept the bed numbering and allocation.
We hope your experience didn't discourage you to stay with us at another occasion.