Ask an Property Solicitor. Get an Answer ASAP.
Hello for clarification - what was leaking?
what do you want to happen please?
Who’s liability this is depends on who was responsible for the leakage and the problems. If it was not of your landlords making, then your claim is against whoever was responsible for the damage and the leak. That is the person that you would pursue for whatever this has cost you which it would not have done which would appear to be the rental for the period between 10 April and 28 April.