Apply suggestions from code review

Co-authored-by: CAAshworth <claire.ashworth@digital.cabinet-office.gov.uk>

CHANGELOG.md

@@ -17,7 +17,7 @@ These changes were made in the following pull requests:
 
 ##### Include the new logo assets
 
-Multiple new image assets are included in this release. These will need to be copied to your service's image assets folder if they aren't being used directly from the Frontend package. By default this folder is located at `/assets/images`.
+Multiple new image assets are included in this release. You will need to copy these to your service's image assets folder if they aren't being used directly from the Frontend package. By default this folder is located at `/assets/images`.
 
 If you are using Nunjucks, the asset path may have been changed by the `assetPath` global variable or `assetsPath` parameter on the header component.
 
@@ -43,7 +43,7 @@ If you are using the `govukHeader` Nunjucks macro in your service, add the `useT
 }) }}
 ```
 
-If you aren't using the Nunjucks macro, locate the HTML for the existing crown and replace it with this updated HTML. Make sure that the URL for the new PNG fallback image is correct.
+If you are not using the Nunjucks macro, locate the HTML for the existing crown and replace it with this updated HTML. Make sure the URL for the new PNG fallback image is correct.
 
 ```html
 <!--[if gt IE 8]><!-->