PDR, not really, risk that is.
In the case of the Falklands we were prepared to lose both carriers and lost several destroyers and escorts, hang the expense.
Less than 20 years earlier we were warned that the loss of one Vulcan would be the same level of political loss as the loss of an aircraft carrier.
It is a balance of political and not military acceptance of risk. To take two more recent examples: would we have risked the F35 in GW1? Would we risk an F35 in downtown Damascus?
I suspect Yes and No respectively.