The CCRC asked him if he wanted to recant his confession. The case was then closed. So I guess so.
https://www.itv.com/news/anglia/story/2014-02-23/murderer-found-dead-in-prison/
Why would they need to ask him that if it was a properly-delivered, above-board confession?
Aside from that oddity, did he reply to the CCRC and say, "Yes, it was me. I confess. I am so sorry to have wasted time and resources and I regret the further distress caused to the family"? Or did his solicitors reply on a similar basis, confirming the veracity of the confession? Or was there no reply at all and the application was left to expire?
Now we're on the subject, just what did his solicitors say about this alleged confession?
On another note, why would he commit suicide? He was almost out of prison. His confession would not have affected this too much. Something was troubling him. A guilty conscience, perhaps? Embarrassment? But he was already caught and in prison, and he already had a guilty conscience, as a (supposedly) guilty man. What had changed?
I am not convinced it was a true confession or that it changes anything. But it seems it's enough for some people. Michael Stone was convicted on the basis of a say-so confession, and even Jeremy's case is similar in that his conviction rests partly on a report of an oral confession to his then-girlfriend that no-one else witnessed. The fact that people do lie about these confessions and the equally obvious fact that some people can and do give false confessions or jokily confess to things they haven't done seems not to figure in the minds of some.
For the police, his 'confession' was superfluous or redundant of course. He was already convicted.