Tescos rubber gloves mask good disinfectant cloths.
Clean off mould with damp cloth and disinfectant applied neat and dispose of cloths. Lightly spray area with disinfectant afterward.
Not bleach too much risk of damage to carpets etc.
Call landlord Monday and say I would like HSS to deliver a dehumidifer tommorrow or I call the environment health officer.
And follow Mrs Mugs advice.
Based on the information posted, I offer my thoughts.Any action you then take is your liability. While commending individual effort, there is no substitute for a thorough review of documents and facts by paid for professional advisers.