The lack of a initial provision of a probe for the A400M means that there is a strong chance that the Nimrod fiasco could recur again with desperate panic measures required to fit IFR equipment in the event of a sudden need. Whether that sudden need will arise is at least a fair chance as history has shown. Furthermore the Nimrod is undoubtedly restricted by the lack of IFR as will be the A330, losing flexibility in deployments and economy of fuel. The expense of providing refuelling capability is small in comparison with the overall programme cost but surely large in future operational effect.