Can someone tell me the handlebar diameter of a Carerra TDF road bike from Halfords Does anyone know or can measure the diameter of the handlebars for the Carerra TDF road bike from Halfords.

It was bought a few years ago and the similar specs on the site aren't helpful. 

This would be at the point where you'd fit cross top levers, so not at the stem.

Update. It's not my bike hence why I can't measure it. Otherwise I wouldn't be asking. Hoping someone has it and can measure or already knows. 

Update 2. I'd hoped to get lucky and that someone here had this bike. Is anyone good at eyeballing the diameter from a video?
Do you have access to calipers? Similar to these. (Pretty handy device to have around if not).

Otherwise, you could take a small string and wrap it around the bars put a mark at the point of overlap, measure with a ruler, then put that high school math to use (diameter = circumference / pi)