<style>
  .gallery {
    --g: 8px;
    /* the gap */
    --s: 500px;
    /* the size */
    display: grid;
    border-radius: 50%;
  }

  .gallery>img {
    grid-area: 1/1;
    width: var(--s);
    aspect-ratio: 1;
    object-fit: cover;
    border-radius: 50%;
    transform: translate(var(--_x, 0), var(--_y, 0));
    cursor: pointer;
    font-size: 0;
    z-index: 0;
    transition: .3s, z-index 0s .3s;
  }

  .gallery img:hover {
    font-size: var(--s);
    z-index: 1;
    transition: transform .2s, font-size .3s .2s, z-index 0s;
  }

  .gallery:hover img {
    transform: translate(0, 0);
  }

  .gallery>img:nth-child(1) {
    clip-path: polygon(50% 50%, .5em 1.2em, 0 1em, 0 0, 100% 0, 100% 1em, calc(100% - .5em) 1.2em);
    --_y: calc(-1*var(--g))
  }

  .gallery>img:nth-child(2) {
    clip-path: polygon(50% 50%, calc(100% - 1.2em) 0.5em, calc(100% - 1em) 0, 100% 0, 100% 100%, calc(100% - 1em) 100%, calc(100% - 1.2em) calc(100% - .5em));
    --_x: var(--g)
  }

  .gallery>img:nth-child(3) {
    clip-path: polygon(50% 50%, calc(100% - .5em) calc(100% - 1.2em), 100% calc(100% - 1.2em), 100% 100%, 0 100%, 0 calc(100% - 1em), .5em calc(100% - 1.2em));
    --_y: var(--g)
  }

  .gallery>img:nth-child(4) {
    clip-path: polygon(50% 50%, 1.2em .5em, 1em 0, 0 0, 0 100%, 1em 100%, 1.2em calc(100% - .5em));
    --_x: calc(-1*var(--g))
  }

  body {
    margin: 0;
    min-height: 100vh;
    display: grid;
    place-content: center;
    background: #005EB8;
  }
</style>

<div class="gallery">
  <img src="https://assets.codepen.io/8889025/Collabrorative.PNG" alt="a hot air balloon">
  <img src="https://assets.codepen.io/8889025/Adventurous.PNG">
  <img src="https://assets.codepen.io/8889025/Reliable.PNG" alt="a small boat">
  <img src="https://assets.codepen.io/8889025/Energetic.PNG" alt="a forest">
</div>
<br><a href="https://nhsbsauk.sharepoint.com.mcas.ms/sites/MyHub/SitePages/Our-Purpose-Vision-and-Values.aspx" target="_blank" class="btn btn-primary btn-block" role="button">Our Purpose, Vision and Values</a>

/*Checked with ESR 17.10.23*/

/*Copied to GitHub*/