Sighted today in a forest whilst riding bikes.

Answers already discounted:

Baby Robin
Forest dimmer switch
Tub of mustard

Missed the "?" off the thread title.

Grammar fail.

Land mine.?

it is a measuring device……….i think.

its a mine!!!! run awayyy!

ant TARDIS

Solar powered French Fancy?

used in mapping

Seismic detector, run away, run away…..

Fool magnet.

Ton – that's pretty much what I thought; some kind of environmental sensor.

Don't know what it might be measuring though.

Magnetic door lock

door bell for "the hatch" (aka lost series 1?)

It's a hand.

mapping device….via satellite

Ton, I'm liking your conviction here.

Any corroborating evidence?

There's nothing I like more than being able to come across a smart bastard so when someone points to one of these and asks what it is I want to be able to answer with smugness and authority.

it,s a do not push button.

Block of magnetic processed cheese.

Naked fingerbob?

Prizes* for most correct and most amusing answers.
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(* There are no prizes)

It's an unopened tin of polish in Celtic's trophy cabinet.

was it fastened down

Trident nuclear fire button… Painted in yellow to be stealth (because in red everyone would have figured was it was… MOD are clever boys you know :d)

Any corroborating evidence?

There's nothing I like more than being able to come across a smart bastard so when someone points to one of these and asks what it is I want to be able to answer with smugness and authority.

Just tell them that it's a mapping device with "smugness and authority" anyway…….that should do it.

Don't ever let a lack of corroborating evidence stand in the way of smugness and authority. And the more absurd your claim, the better……..just remember the smugness and authority.

it's the sunshine switch and if you turned it the wrong way i'll cry

It's an unopened tin of polish in Celtic's trophy cabinet.

Contender for one of the prizes, if I wasn't so bitter ;o)

Ton – don't know as we didn't want to move it.

Is it a crown race machine?

gordon browns self destruct button for the next time he calls an old lady a bigot!

it's aaaaaaliiiiiive!

It's a watsit you know thingymajig that thing that does you know it was on the telly the other day the bloke with the grey hair funny accent he was in that program you remember. Really though it's the thermostat for this summer. Environmental scientists hide them in a different place every year and the lucky finder gets to turn up the heat for summer. The last 2 years nobody has found it hence the crappy summers. Hope you turned it the right way?

Oh what tyres did you use to ride over it?

Honest answer is a TBM temporary bench mark

It's an alien spaceship. Much smaller in real life than on the telly aren't they.

"What do you think this button d……………………………"
said the last person who found one of these.

a TBM temporary bench mark

We weren't ready for the 'real answer' yet……….I bet you'd spoil Mock The Week too 😐

Sturmey is correct – it's a TBM.

TBM – Temporary Bench Mark

A datum point for topographical surveying or setting-out.

Pull yer toys back in ernie 😉

aah! I know where there's one of those, I've been wondering about it for ages.

I've been wondering about it for ages.

😕 ages ? So how long is "temporary" then ?

So will they put a bench there eventually for you to sit on?