No Decision Maker's Letter

Ok, so I've just had a bit of a strange conversation with a DWP representative, who told me that a decision maker's letter/report does not even exist regarding the Maximus test I underwent earlier this year, and as a result of which I have been put into the WRAG group.

They were fine to send the HPC's report, which they had on their system, but also told me that I shouldn't have expected any letter or report from the decision maker, because I had been put into the WRAG group, not denied ESA altogether. After looking on the system, the DWP employee then insisted that any record of the decision maker's thinking and appraisal was nowhere to be found.

I was calling because I wanted to start the process to appeal the decision, in order to be put into the support group. The DWP sent me a letter to say the amount I had been awarded and what category I had been put in, but no reasons about why.

Is this normal? It doesn't seem logical to me, after all how can you challenge a decision if you don't know how it was arrived at?

Thanks Gordon that's useful to know.

By "assessment report" do you mean the HPC's report or the one done by the decision maker? If it's the latter, then they told me the didn't have that either.

I forget offhand, the awarding of points is done by the DWP isn't it, not the HPC? Is that correct?

Oh I see, thanks.

Are the number of points you actually get always the same as what the HPC recommends?

Could it happen that the DWP decision maker awards a different number of points than the
HPC, or comes to very different conclusions than what the HPC has recommended in their report?

Also, if you can't see the decision maker's reasoning, how is it possible to challenge the decision, or the faulty assumptions he or she may have made ?

Sorry, lots of questions, just wondering how it works.