Time outside the UK-GTV

“If you have a Global Talent visa, time you've spent outside the UK doing work related to your job may not count towards this 180-day limit. This rule applies if you were endorsed by the Royal Society, Royal Academy of Engineering, British Academy or UK Research and Innovation.”

I have a few questions about the above passage：

1.Does the employer have to be British?

2.Does only research work meet this requirement?

Does anyone know about this please answer my query.

Thanks a lot.