Quoting from the original article:
'In most formal circumstances, offenders are legally obliged to declare a conviction when asked, until it becomes “spent”: currently this takes seven years for sentences of up to six months and a decade for sentences of up to 2.5 years. Sentences longer than that are never spent.'
...
'The past 12 months have seen other improvements. “Spent” periods are due to be reduced at the end of this year—under the current system, Huhne and Pryce have to wait 10 years before their convictions are spent, but following the changes this will be reduced to just under five years.'
The information appears to be correct, inasmuch as the relevant provisions of The Legal Aid, Sentencing and Punishment of Offenders Act 2012, in regard of changes to the ROA 1974, are awaiting commencement which is expected in November 2013.
http://www.legislation.gov.uk/ukpga/2012/10/part/3/chapter/8/enacted