Rose Gentle, the Glasgow mother whose 19-year-old son, Fusilier Gordon Gentle, died in a roadside bomb blast in Iraq, finally heard a coroner deliver the verdict she wanted to hear yesterday. Knowing that her son was unlawfully killed will not assuage the bitterness, but it will help that the truth has been established, and criticism officially levelled at the Army's "chaotic" supply chain in Basra.

In the three years and four months since her son was killed, Mrs Gentle has insisted that his death could have been prevented by bomb-jamming equipment that should have been fitted to his vehicle. Yesterday, her persistence in having information disclosed to the inquest was vindicated when Selena Lynch, assistant deputy coroner for Oxfordshire, ruled: "It is more likely than not that the bomb would not have detonated had Element B (a bomb jamming kit) been fitted."

It must be particularly galling for Rose Gentle to have it confirmed that the electronic counter-measure (ECM) intended for his vehicle was gathering dust in a Basra storeroom, just one kilometre away from the Royal Highland Fusiliers' base, but a proper account of the conduct of the war in Iraq - and military intervention elsewhere - is vital. One of Mrs Gentle's main motivations in her quest for the truth was to ensure that lessons would be learned from the mistakes which led to the death of her son. The publicity from this inquest should ensure that communication procedures are tightened, but there are wider issues. The Ministry of Defence has traditionally fallen back on the argument that in the inevitable disruption and changing scenario of war, the best preparations can fail. That is true, but it is no excuse for logistical back-up not being as efficient as possible, nor does it mean that no-one should be held to account when it fails.

Although the armed forces minister, Bob Ainsworth, yesterday gave assurances that lessons had been learned from the internal board of inquiry into Fusilier Gentle's death and its recommendations accepted, a sense of unease remains over the difficulties coroners face in getting the MoD to disclose evidence. Yesterday, Ms Lynch criticised their policies for disclosure as "illogical and based on errors of law".

Of course there are some pieces of information which no army should disclose publicly, but that need not prevent establishing the facts of death. If necessary, certain details can be restricted, as happened at the inquest into the death of Lance Corporal Matty Hull, when a cockpit tape from the American aircraft involved in the friendly-fire incident was played only to family and the coroner. Yet that was achieved only after high-level negotiations following a campaign by Lance Corporal Hull's young widow.

The general difficulty in obtaining evidence is adding, unnecessarily and unacceptably, to delays in inquests.

The possibility of holding inquests for service personnel repatriated through Brize Norton outside Oxfordshire should be explored, but the MoD must also adopt a more open approach. That it is out of touch with the requirements of the 21st century was underlined by the insensitive timing of the announcement yesterday that the defence equipment minister, Lord Drayson, is to leave the government to pursue his motor-racing "dream". Compare that with the ambition of Rose Gentle, an ordinary housewife from Pollok, who campaigned for three years to say: "Justice has been done. The truth has come out."

As we prepare to honour the memory of all those who have fallen in conflict, there is added sorrow for a new generation; in saluting their courage we should also acknowledge the bravery of the families whose grief remains so raw.