Average monthly gas/water/electric bills?

I have just taken over tenancy for a three bedroomed house in the midlands. I have never had to pay bills before so all a bit new. Trying to work out on average my Water, Gas and Electric will be each month.. There is Two adults and Two babies in the house and our current supplier is Npower....Others have advised... show more I have just taken over tenancy for a three bedroomed house in the midlands. I have never had to pay bills before so all a bit new. Trying to work out on average my Water, Gas and Electric will be each month.. There is Two adults and Two babies in the house and our current supplier is Npower....Others have advised of 40 pound a month for each...Does this seem right? Any ideas???
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