In answer to Harnett and at the risk of sparking controversy:
Back in the heady days of 1997, I believed that separation from the FCO was a good move. Now I'm less convinced. Perhaps I'm turning into an old cynic, but also the world seems a different place from then. Isn't the reality that aid is and will increasingly be a tool of foreign policy no matter how it's dressed up in MDGs and Gleneagles Agreements? I've seen DFID pull out of, or begin pulling out of, too many middling income countries where well targeted assistance could have had an impact and would have been welcomed, as well as having important foreign policy significance. The absence of British assistance and the accompanying influence in some of our nearer neighbours, Albania and Moldova for example, is not helpful. DFID winding down in Southeast Asia also seems like an odd idea.
In 1997, we also had 'an ethical foreign policy': that was rather shorter-lived than DFID! I wouldn't be too perturbed if ODA re-emerged under the FCO.