A student recently mentioned that the UK government & SIA provide a very good free counter terrorism course for anyone willing to do it online.
In fact, there are two modules, one as an introduction and for non-security people and a separate security staff module, both are well worth a look and should prove valuable to all individuals involved in security. I would suggest you have a look at the website, follow the instructions to get access and complete both modules.
Here is the link;
While worth a look, enjoy 👍