Why does my grid always use wgs84 instead of the data frame projection?

[ChrisHills]

The coordinate system of my data frame is set to British National Grid, however when I try to add a grid (graticule) it is always projected using WGS84. How can I add a grid using the correct projection?

ArcGIS version is 10.2.1.3497.

[DanPatterson_Retired]

I suspect that the data are in wgs84, did you follow the steps as outlined here

[ChrisHills]

Thanks for the pointer Dan, the answer was to use measured projection instead of graticule.