The Climbing Wall Leading Award (CWLD) has been renamed to Climbing Wall Development Instructor (CWDI) please head here to the Climbing Wall Development Instructor (CWDI) page
The Climbing Wall Leading Award (CWLA) is for people who wish to teach leading in climbing walls or on artificial climbing structures.
What next, a few steps to help you become a Climbing Wall Leading Award (CWLA) instructor;
More information can be found on the Mountain Training website.
If you have any questions or if there is anything I can help with please let me know