>>151826651
>>151826771
Double barreled names. It used to be a posh thing, due to both families in a union refusing to be the junior to the other (e.g. when the wife takes her husband's surname), but now it happens because working class women have children with men who abandon the household.
Naming cultural in general is closely linked to wealth. For example if a first name is popular among posh people in the 1960s, middle class people will associate that name with prosperity, and then that's followed by working class people thinking the same thing.
So the explosion of mutts with double barrelled surnames is because of working class single mums who think it's associated with prosperity. Not even THAT far off given how many of them become highly paid rightbacks in the Premier League.
Additional fun fact: the addition of a hyphen in double barrelled surnames is relatively new. There are some properly old families in the upper classes with a double barrelled surname but with no hyphen.