Alex Salmond has demanded an apology from David Cameron for failing to tell Scottish ministers about a radiation problem at a nuclear submarine test reactor.
The First Minister said the UK Government had "disrespected" Holyrood and the people of Scotland by not alerting the Scottish Government to the problem for almost two years.
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"Our ability to pre-empt or respond to threats will be eroded if we don't keep up with our adversaries."
"You are one of the silence breakers and we all owe you a debt of gratitude."
Maximum temperature 11 C (52 F).