Well done,
Lennart.
I do hope that our members can work together to find a deffinitive answer to the question you have raised, rather than pedantically stating unfounded opinions.
Even if it means I will have to spend weeks changing my computer files from "109E" to "109 E" etc.
Revi16. I get your point, and this may explain the use of different forms. But
IF we can uncover an official directive we can avoid prolonging the disorder.