What is the best way to show all employees for a specific element even if they do not have it?

Summary:

I need to build a report showing all employees, but needs to show a specific element if the employee has it, and leave a blank if they don't

Content (required):

Show all employees that have london weighting, but also show all employees that don't.

Is there a simple way of showing everyone and then displaying the data to show whether they have this element or not?

Version (include the version you are using, if applicable):

OTBI - Oracle Business Intelligence 11.1.1.9

Code Snippet (add any code snippets that support your topic, if applicable):