The devolution referendums of 1997 progressed in different ways. In Scotland the late Donald Dewar's campaign for the "Yes-Yes" option - to set up a new Scottish Parliament and to give it the power to vary taxes - received resounding approval in the polls. But Wales was to be offered an assembly without the tax-raising option, and the result was in doubt until the last moment. In the last of the series, Huw Edwards reports on two ways to win a referendum.
(Repeated from Sunday 10.45pm)