govuk-frontend/dist/govuk/components/file-upload/template-with-value.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">
  <label class="govuk-label" for="file-upload-4">
    Upload a photo
  </label>
  <input class="govuk-file-upload" id="file-upload-4" name="file-upload-4" type="file" value="C:&#92;fakepath&#92;myphoto.jpg">
</div>