In its annual report on the MoD's major equipment projects, the National Audit Office disclosed that delays to the £32 million Falcon communications system, which was developed for use in Afghanistan, meant it would not now be ready until after British troops have withdrawn in 2014.
Overall, it found that cost projected overruns for the 16 biggest programmes had increased by £468 million over the past year, while total delays have risen by 139 months.
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Police said the child, who was without a driving licence, was trying to make his way 2,500 miles from the east coast to Perth.
The 24-year-old was charged with 14 counts of wounding with intent to do grievous bodily harm and one count of throwing a corrosive fluid.
Winds will veer northerly overnight with colder air streaming in over the next few days.