Previously you may have seen that some addresses weren't shown within Alert when adding a new user, we have recently undertaken some development work to enable a geographic address lookup if the address you’re looking for isn’t listed. It should look like this:
If you’re not getting the additional yellow button, please clear your browser's cache and try again (you can press CTRL + SHIFT + DELETE or CTRL + SHIFT + R on most browsers to do this).
Once the yellow button is clicked, it will do a geographic address lookup rather than a postal address search, and give you a new list where any geographical addresses will then be shown:
While we’ve done the development work to allow for an additional geographic address lookup, the best method would be to report to Royal Mail that it is in fact a Delivery Point Address which you can do from their website https://www.royalmail.com/personal/receiving-mail/update-your-address. By getting them to update the Royal Mail Postcode Address File it will help in all the other services that use their data.