"How often do we see reports on the BBC morning news of the great job our troops are doing, keeping the peace, rebuilding infrastructure, helping to get a democratic Iraq on its feet."
Not often in the morning news headlines, because it patently isn't news. "British Army displays great professionalism" is hardly "Man bites dog" is it? But new deployments, outstanding incidents etc. Army participation in news events (eg elections) are reported, and there are frequent 'Mike Hack reports from his patrol with the Queen's Royal Shunt Tappers in Basrah' type reports, which always seem to emphasise the professionalism of the troops, and the good they are doing in Iraq.
But there is a great deal of media coverage (on the BBC and elsewhere) of exactly what you describe. More often in regional and local programmes and in local and regional papers where there is a local connection with a particular individual or unit. There is certainly a great deal of supportive and sympathetic coverage of casualties, and the media tends to take the side of 'our boys' when procurement people or politicos let them down.
But again, when British troops act in a way that disgraces their uniform and shames their country, they deserve censure.