 This evolved as the nature of warfare and geopolitics changed, with the pamphlets concurrently updated into "Advising the Householder on Protection against Nuclear Attack" in 1963.This document, of which 500,000 copies were made, garnered considerable public and government criticism when it was first released for its lack of explanations or conveyance of the reasoning behind the advice that was given.The Estimates Committee were similarly bemused by the advice, calling for its withdrawal.