my-theme.css

/* adds NHS logo in top right and circles in bottom right of all slides */
slides > slide {
  background: white;
  background-image: url("images/slide_background.png");
  background-size: cover;
}

/* overrides the background that has just been applied to all slides for the title slide so only the NHS logo is shown */
.title-slide {
  background: white;
  background-image: url("images/nhs_logo.png") !important;
  background-repeat: no-repeat;
  background-position: 750px 50px;
}

/* removes slide numbers because they look rubbish with the circles*/
slides > slide:not(.nobackground):after {
  content: '';
}

/* aligns two-column slides in the center */
div {
  text-align: center;
  vertical-align: baseline;
}