Exeo brakes.

[STEWY L]

My brakes have recently developed a problem, although it sailed through its mot in May .
i don't think I'm getting any servo assistance, the pads and discs are almost like new,
but im having to stand on the brake pedal to get the car to come to a standstill, and at times, whilst it slows
to a snails pace, it doesn't actually stop !
would it be vacuum pipes ? Servo u/s , or perhaps a seized calliper do you think ?
grateful for any suggestions, thanks.

kv 10 WBJ 2010 143 cr estate.

[STEWY L]

Update,
the servo has failed with oil in the vacuum pipes causing the diaphragm to perish.
oil coming from dual pump I'm told .
should get the car back tomorrow .