British bombing in Iraq and Syria in the fight against IS resulted in more than 4K munitions in the two countries — it seems incredibly unlikely that not a single civilian was killed during said campaign. Besides the deaths that were uncovered in the Guardian's investigation, there were almost certainly more victims for whom the UK's military failed to properly account. Justice and accountability for their deaths must be pursued.
This investigation reinforces that the UK's armed forces must comply with the highest possible operational standards. However, regardless of debate over the particulars, one must keep in mind that the fight against IS was absolutely necessary, and that UK forces did everything in their power to reduce civilian casualties. Going forward, the UK is always trying to improve its tactics.