govuk-frontend/dist/govuk/components/checkboxes/template-without-fieldset.html

GOV.UK Frontend contains the code you need to start building a user interface for government platforms and services.

<div class="govuk-form-group">
  <div class="govuk-checkboxes" data-module="govuk-checkboxes">
    <div class="govuk-checkboxes__item">
      <input class="govuk-checkboxes__input" id="colours" name="colours" type="checkbox" value="red">
      <label class="govuk-label govuk-checkboxes__label" for="colours">
        Red
      </label>
    </div>
    <div class="govuk-checkboxes__item">
      <input class="govuk-checkboxes__input" id="colours-2" name="colours" type="checkbox" value="green">
      <label class="govuk-label govuk-checkboxes__label" for="colours-2">
        Green
      </label>
    </div>
    <div class="govuk-checkboxes__item">
      <input class="govuk-checkboxes__input" id="colours-3" name="colours" type="checkbox" value="blue">
      <label class="govuk-label govuk-checkboxes__label" for="colours-3">
        Blue
      </label>
    </div>
  </div>
</div>