Thanks for the reply, I will forward the info/link to our Health and Safety bod. He has probably seen it but it can't hurt to have it twice!
Our main concern is that Signallers look at the VDUs for 2 hours and then have a break.
The management state that if they look away from the screen for a split second that means they are not using them constantly! So are lookingn to reduce the breaks to the bare minimum (10 minutes per hour)
Once again, thanks for the info.
James