His Facebook page implies a tonne bag of logs is a tonne of logs, it’s not. Just be aware. Those bags are 1 cubic metre ie 1mx1mx1m you’d be hard pushed to fit a tonne of logs into a 1 cubic metre bag.
I think he just calls it a ton bag, that's how every one refers to them really, don't think that's underhand
I don't even think all builders bags are necessarily 1m3, some are .6 of a cubic meter, so if the bag wasn't in fact 1m3, that would be sly
at the price delivered, if dry, it might be value