Hi Dansoarr,
You can only claim from a percentage of the house bills if you are self employed or a partner in a partnership.
Employees can only claim £6.00 per week working from home expense or the exact amount of exact amount of extra costs you’ve incurred above the weekly amount, you’ll need evidence such as receipts, bills or contracts.
Have a look here:
Expenses if you're self-employed
and
Claim tax relief for your job expenses
The guidance also advises how to apportion household bills.
Thank you.