hi, i'm new here and wondering if anyone can help. i work for a disabled person who has a private let in scotland. when he took the let it was agreed that the rent was ~£300 per month. now 3 years on they are pursiung him for a massive amount of arrears cos they say that it was £300 per week. can we challenge this? no one seems to have original tenancy agreement including tenant or agreement that states that this was agreed rent. help!