“If two people share a house they each get the maximum Winter Fuel Allowance, if they are married they each get half. “
Not so, I’m afraid hc.
WFA is paid on a per household basis and the marital status of those living in the same household is not relevant. The government website gives you the details:
https://www.gov.uk/winter-fuel-payment/overview
To save you looking all through it says this about “what you will get”:
“You qualify and live alone (or none of the people you live with qualify) - £200”
“You live with someone under 80 who also qualifies - £100”
There are higher rates for people over 80, but the principle is the same. The issue is not whether they are married (or in a civil partnership) or whether they are single, but whether they share a household. If they share then the WFA is split.