CCM-17449: Add redirect to preview page when lockNumber conflict happens in the API#953

m-salaudeen wants to merge 2 commits into

mainNHSDigital/nhs-notify-web-template-management:mainfrom

feature/CCM-17449_redirect_to_letter_preview_page_if_api_validation_failsNHSDigital/nhs-notify-web-template-management:feature/CCM-17449_redirect_to_letter_preview_page_if_api_validation_failsCopy head branch name to clipboard