After lots of fiddling I got there.
Have had to hack the core contact component file to make it display.
The template style I created (for Hire) didn’t work but altering the default style to grab that as the style it did.
Makes no sense but who cares.
Gantry or the template strips any php code included in custom html, which was my previous thinking.
No editor enabled.
Lots of notes kept in case I need to do that again