It's en_gb and not en_uk (although UK is exceptionally reserved [1], and we recently begun using UK on car nationality identifier stickers).

[1] https://en.wikipedia.org/wiki/ISO_3166-1_alpha-2#Exceptional...

Afterburner is a common term in both countries. Reheat is and always was a semi-official slang used in the UK and is a reference to the similarity in concept to reheat steam turbine.

Note that Concorde "B" was meant to use a variant of the Olympus 593 without reheat, but ultimately lack of sales of the original aircraft doomed it.

It used afterburners for takeoff and accelerating through Mach 1.

So afterburner then. 'Merica.