Yes. "marque"would make more sense, Olly
it would also account for "reportedly" in the clue...….
"marque" soundslike "mark"
See Collins Online
marque in British
(mɑːk )
noun
1.
a brand of product, esp of a car
2.
an emblem or nameplate used to identify a product, esp a car
3.
letter of marque