UK Car Repair: cutting out fiesta, accelerator cable, ford fiesta

Question
my 1998 ford fiesta keeps cutting out as i slow down to stop at lights or junctions etc i have taken it back to the dealer 5 times and he changed an electrical thing on it but it hasernt worked it still does it and now he says that he doesn't no what can be causing it what can be the problem so i can get him to fix it?

Answer
have you tried adjusting the idle speed a little higher?
The throttle stop can wear down over time and needs adjusting occasionally...

What is the idle speed when the engine has warmed up (if the car has a tachometer)?
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If you can send me a photo of the throttle body (where the accelerator cable connects) i'll point out the screw you need to turn to turn up the idle speed and make the engine less susceptible to stalling.

(I guess it stalls when your'e braking with the clutch pressed in, it just rolls to a stop)