Assuming your home office takes up a small fraction of the house, and electricity is for heating and light for one room, say, computer and peripherals, I would leave the bills in your personal name.
One sixth sounds reasonable to claim back, if one room is used as home office. You can only claim vat relief on the business expense, so one sixth of the net cost, then work out the vat on that for your vat returns.
Keep all records neatly with your company invoices, and mark on each the details of what refund you claimed frrom the company. As a straight refund of expenses this should be taxfree in your hands.