A quick note because this was tricky.
Go to Web of Knowledge and click on the Web of Science tab. Click on "Advanced Search" and enter something like:
OG = "De Montfort Univ"
You will get a table that lists your search and in blue the number of results. Click on "Save History / Create Alert". If you're registered and logged in then you'll be able to set up your alert then. Otherwise, once you've registered you'll come back to this page.
Seems easy but it took 2 librarians, an ITMS and phone-a-friend to find it.