We had a terrible leak from upstairs last month and which caused a lot of damage and mould issues. Landlord asked us to keep the heating on and run our dehumidifier which we did. We’ve just had an energy bill through for just shy of £400. I’m honestly shaking. Our bill is usually within the region of 160/170£. Can I ask the landlord for support with this or are we liable even though the leak was from the upstairs flat?