But see what others think
Indeed.
It's a pity you didn't ask for photos to help identify the driver and/or location before you identified yourself as the driver.
Struggling to see how this helps the OP. Perhaps you are suggesting that if he were to modify a DeLorean and reach 88mph (preferably somewhere where there are no speed cameras) and ask for said photos before identifying himself?
Identifying your self as the driver rather suggests that you know the location - otherwise how could you identify yourself?
I would suggest otherwise.
If I was driving my car, that nobody else drives, from London to Newcastle and received a NIP relating to some vague location in Yorkshire part way through my journey, I think both that I would have a pretty good idea that I was driving, and that a bench would take a pretty dim view of a response saying that I don't know whether I or my car was there as I do not recall being caught, and cannot be certain that the location is correct, plates were not cloned or misread, and/or that I had not been abducted by aliens at the time.
AIUI the police are under no obligation to supply "images" or other evidence at this stage.
Correct
You will only get that if the case goes to court.
Probably
If you are asking for evidence now, the danger is the police will interpret that as you refusing both the offers of a course or a fixed penalty, and your case will go to court.
As regards the course (if applicable), correct. As regards the fixed penalty (assuming already offered), unless s. 75 RTOA 1988 has been amended to allow a COFP to be rescinded because the po-po didn't like his attitude, then not so much.
N.B. If a course has been offered (as opposed to tick here if you would like to be considered) then the alleged speed would be between 57 and 64 and/or if a COFP has been issued, between 57 and 75.