.button-secondary {
  @include button ($ministry-of-justice);
  margin: 0 $gutter-half $gutter-half 0;
  padding: em(10) em(15) em(5) em(15);
  vertical-align: top;
}

.button-get-started{
  background-image: url('/assets/icons/icon-pointer.png');
}

.button-secondary {
  @include button ($ministry-of-justice);
  margin: 0 $gutter-half $gutter-half 0;
  padding: em(10) em(15) em(5) em(15);
  vertical-align: top;
}

.button-get-started{
  background-image: image-url('icons/icon-pointer.png');
}

Change url() to image-url() for the start icon pointer
Change url() to image-url() for the start icon pointer
