I'm just musing.

The bags appear to be standard one ton bags. Hundreds of them. Where are
they coming from? I wonder how much they are costing. A ton of ballast
is normally £35 to £40. Are they actually ballast (as commonly
understood), or are some sand and some stone? What will happen
afterwards? Will the bags deteriorate, making it impossible for them to
be picked up by a crane? Will they be removed in fact? If so, where to?

It amazes me that blades whizzing round in the air can lift three tons.
Aren't I silly?

Bill