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I can't vouch for the Tories (they definitely want to keep the "biometric visa" ID cards for foreign nationals, among other things), but the claim that the Lib Dems would keep the National Identity Register is unmitigated horseshit and slander.
The Liberal Democrats have always said that they will scrap the card, scrap the register and repeal the Identity Cards Act which allows the State to create such databases. You can't get more strong opposition to the scheme than that.
Source: http://freedom.libdems.org.uk/the-freedom-bill/full-text-of-the-freedom-bill/#idcards is the text of the Freedom Bill which the Lib Dems would introduce to restore civil liberties.