Are the police now using mobile speed cameras at night?

Travelling North along the A34 approaching the Pear Tree intersection Oxford at around 7.30pm on 18 November, I witnessed a lot of traffic braking violently up ahead. An accident was very, very close to happening.

The cause of the slowing traffic was a mobile speed camera van parked just off the carriageway. It had no lights on and was difficult to see until the last minute. This could just be more dangerous than its intended purpose.

Asked on 19 November 2012 by Mr TT

Answered by Honest John
I agree.
Similar questions
Why are cat's eyes disappearing from many roads, when their aid to safer driving is well documented ?
My wife has some eyesight issues which can make driving in the dark difficult because of approaching headlights. An eye specialist has recommended that she tries night driving with the interior light turned...
Are there any regulations on a learner diver being instructed at night? I overtook one, the weather was poor and the L plate was almost invisible, if it can't be seen then what's the point in having it...