War service badge. ID help request.

[melh]

I'm new here and have inadvertently placed my first post in the 'Introductions' thread and now realise that the Home Front would have been the appropriate place for it so here it is.

I have a small group of War Service Badges that came to me with an old collection a while since, there's one that I'm not familiar with.
It's the oval one in the centre of the photo with the initials R.A.O.D.
I have seen one of a similar form online which is marked as, West Riding Works & Services, which leads me to think that it's corporation related rather than industrial.

There's another one that I find interesting, the Enamel R.O.F. one marked National Industrial Mobile Squad. Can I assume that it was something of a rescue service for the ordnance industry?

I'd be grateful for any information.
Mel.