Revert "Merge pull request #1134 from moneyadviceservice/remove-404-page-feature"
Revert "Merge pull request #1134 from moneyadviceservice/remove-404-page-feature"

This reverts commit b90b62d98a56ece71c973c5b48ff662c79563553, reversing
changes made to 1b8628353ade1eb4b3cde932bab49292c562a3c3.

moneyadviceservice/frontend,moneyadviceservice/frontend,moneyadviceservice/frontend,moneyadviceservice/frontend