What is it?

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Looks a bit like a mirror. So that the driver can see something on the trailer from up front, a guage perhaps?johndibben wrote:Yep, it's as Richard says but I don't know what the aerial thing is
Not sure about the mirror idea, but a simple gauge sounds like a stronge possiblity. Presumably at short notice it wouldnt have been possible to put a fuel gauge linking to the driver, alot easier to mount it on the trailer itself at a height where the driver could look through his rear view mirror to see it.PaulH2 wrote:
Looks a bit like a mirror. So that the driver can see something on the trailer from up front, a guage perhaps?