Sorry i think there’s a little confusion here.
There is no clutch master cylinder on a fiesta, but they do have a clutch slave (being the fork and thrust bearing assembly which may have a hydraulic component), but being a cable-operated clutch, there isn’t actually a hydraulic master or slave "cylinder" (in the traditional sense if that makes sense).
_2: Mechanics being mechanics may still call it a “slave cylinder” I guess.
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Piotr, out of intrest, do you know what actually “blew” on yours or just that it was that component?