DS is in a shared house this year and has only just moved back even though the tenancy started in July and some of his flatmated moved in then.Problem is the lead tenant has moved his gf (who is not on the tenancy agreement) into his room in the summer and given her DS's key.DS cannot get back into the house if no-one else is at home.This girl and her bf keep say they will get him a key cut but they haven't yet.And anyway the GFs key belonhgs to DS, she shouldn't even be there.Ds doesn't like to rock the boat, but I think he is going to have to
What is the legal situation?