Add taxonomy term description to view header

Hopefully this will be an easy question but just starting out with drupal and cant seem to work this one out!

I'm trying to add the taxonomy term description into the header of the associated view, so for context: i have a vocabulary called products, in which i have some product categories each with a title and a description. I'm editing the taxonomy term view and can add a 'Global: Text area (Global: Text area)' into the header but i cant find anyway to add the description of the term into this?

I've tried created a relationship for 'Content: Taxonomy terms on node' which then allows me to display the term description in my product list under the header but obviously this is repeated on each product so i just need it once in the header if possible?

Many thanks in advance!