RAF Wireless Operator/Radar Operator

[SAS1]

Can anyone give positive Identification to these two badges re trade, date and service?

I have the badge with the red 'O' as a WW2 RAF radar operator, and indeed have a photo of it being worn by an RAF Airman circa WW2.

The other I have as a WW2 RAF wireless operator variation. Although in 'RAF' colours and with a similar red centrepiece, is it RAF and if so what is the significance of the red fist?

Many thanks.