DM was taken into hospital on 1st July this year, for around a month. She was then in a care home until she died on 31st August. At no point did she go home in between these dates.
I have been to her house a few times to collect things and start clearing it out. When I went today, I heard a funny noise in the garden and found the outside tap was on! I've got no idea how or when it was turned on, and I don't know how long it's been running or anything. I also know she didn't leave it on when she was still there, because I went into the garden the day she was taken to hospital to speak on the phone, and it wasn't on then (I didn't turn it on either!). Nobody has been in the garden since. Nobody else has a front door key.
When and if we/she gets a massive water bill, what do I do? Do we have to pay it? She has no assets for them to claim it back from. The house is rented privately (until Sept 27th), she has no car, she transferred the last of her money in her bank account to me, and my DC's savings, before she died. This was about £3k in total, some of which has already gone on cremation costs. She was disabled and in the last few years lived off of benefits and her small amount of savings.
As next of kin, am I liable for the bill? If it's astronomical there's no way I'll be able to afford it.