DD is a 2nd year student at Uni. In September she moved into a flat with friends, but had to move out after 2 of the girls got very involved with drugs, bringing strangers back to the flat etc. She explained the situation to the letting agency, who did an inspection of her room and took her keys back. She had to keep paying the rent as per the contract, which she has done, but was told they would take the last month out of her damage deposit. They have now contacted her to say that she will, in fact, have to pay the last month's rent, as there may be damage that will have to be paid for from the deposit.
When DD said how could they hold her responsible as she has not had access to the flat, they said she could have her keys back if she wanted
. Is she liable?