Surely writing 374 lbs is easier than 26st 10lb.
When it comes to units, you can't please everybody. Especially if it's tangentially related to the old colonies.
Not everybody measures weight in pounds, and to the primary readership of the BBC, stones and kilograms mean much more than weighing pounds.
Source: Canadian who understands neither kg or stones.
An unrelated point. I’ve noticed more people in the UK measuring their weight in KG. I think I may be in a dwindling minority of people who think in stones and pounds.