Problems with damp (tenant)?

i moved into my property a little over 5 weeks ago (rented) everything seemed fine for the 1st couple of weeks and then i noticed damp patches coming through on the chimney , on 2 walls in the living room, 2 walls in the main bedroom and on 1 wall in the spare room. now it has progressively spread and mould has appeared in the 2 bedrooms (in the main bedroom theres a patch about 1 foot squared) and in the bathroom, which is constantly damp (really bad condensation) i want to know if the landlord had to do any checks for the damp before hand because this is a problem that hasn't just occured over night and if they need to carry out the repairs. thank you