It's the "smart" water meter not the dead wifi that will let the smarter burglar know you're away. No security on these barsteward devices so any daily passerby with a reader can see you've consumed no water in the past 24 hours.
As the UK utility companies don't want to know about this (or any other cyber security shortcomings brought to their attention, you'll just have to leave a tap running whilst you holiday.
Biting the hand that feeds IT
