You need to have a minimum of 2 years of work experience which comes to a minimum of 2800 hours In order to be eligible for the Chevening Scholarship. 

I help you to figure out if you do meet those requirements and they type of work considered by the scholarship 

Helfpful inks: 

https://www.chevening.org/scholarships/who-can-apply/work-experience/

https://www.chevening.org/news/work-experience-four-key-points-to-help-you-apply/