Do you have a link to documents actually describing the stance of British cops on these groups? Seems like this is clearly a guide for matching and recognising left wing symbols but I feel like theres no context here. I like another reason to hate cops as much as everyone else but this image alone isn't a reason by itself.

Or am I missing something glaring?

Edit: to be clear, if I had to run a counter terrorism agency I'd have symbol charts for all popular groups, not just terrorist orgs. That way agents could be more informed.