Who the he'll spends over a grand on utility bills per month?
The numbers don't stack up in my opinion.
It's an terraced house which looks to be around 1000 sq ft and of modern construction. Heating that would be no more than £400 a year (even on oil / I can't see it using over 1000 litres a year). Council tax band wise due to the fact it is in Surrey I would believe it is probably a band E so I would guess around £2000-£2500 a year in council tax.
Being modern it is probably on a water meter and if not then the rateable value would under £700 a year.
The average home uses around 3,000 kWh of power a year in electric. If they are paying 12p per kWh then power wise that would £360 a year.
Perhaps they have very expensive mobile contracts and have bundled in an expensive sky package with the costs, even then I can't see how it could be £1k a month.