span.alpha-tag {
  @include core-16;

  // FIXME: Replace with the phase-tag @mixin
  // when it's released by the govuk_frontend_toolkit

  text-transform: uppercase;
  letter-spacing: 1px;
  color: $white;
  -webkit-font-smoothing: subpixel-antialiased;
  background-color: $alpha-colour;
  padding: 2px 5px 0;
  display:inline-block;
  vertical-align:top;
  margin: 2px 0 0 1px;
}

#global-header-bar .header-bar {
  background-color: $primary-colour;
}

@import 'design-patterns/_alpha-beta';

span.alpha-tag {
  @include phase-tag($state: alpha);
  margin-left: 2px;
  position: relative;
  top: -2px;
}

#global-header-bar .header-bar {
  background-color: $primary-colour;
}

Use the toolkit's new phase-tag mixin
Use the toolkit's new phase-tag mixin
