Re: Computer says No.
I too have experience of UK government agencies losing secure database information.
A couple of years ago when selling my house, the Land Registry Office ( a government database of all land ownership which we are forced to deal with ) actually LOST the deeds to my house during a sale, which of course failed. Their attitude could only be cleanly summarised as "these things happen, tough luck, not our problem".
This is precisely what will happen with ID cards, as it already happens with Criminal Record Bureau checks - they are very quick to give themselves bonuses and pensions, but there is no incentive to work accurately with sensitive information, or to take the consequences of their mistakes, or even to correct them as quickly as they made them.