Sorry to resurrect an old-ish thread.
I'm having difficulty with this. Have tried twice and get the "Based on what you told us, you cannot prove your identity with GOV.UK One Login" message.
I've got an email address verified, so far so good.
Downloaded and opened the GOV.UK One Login app on a mobile phone. Got a new one recently with all this in mind.
Cutting short - the app took a photo of my driving licence. Then I entered details from my passport.
It told me it was checking with Experian - not Equifax as was mentioned above. "Based on what you told us you cannot prove your identity".
Was only one question - what year did you move into your current address. I have subsequently logged into my Experian, and yes it shows the date exactly as I had entered. (A long time ago).
Some days later I tried again, with a whole new email address just in case I'd mucked up previously.
Got exactly the same rejection.
So their website says the post office can do this. I went into a big main post office, the "Digital" counter. Got a photocopy of my passport and driving licence, and he rubber stamped the copies, gave them back to me and said I'd need to post them into Companies House myself. Verification???
Have phoned the helpline several times. Note that you get a Reference Number when the process failed. Helpline didn't want that. Helpline was no help. Said because to protect me from Identity Theft. Mentioned could use an ACSP to do all this for me. And no there is no public list of ACSPs.
Got on to the Law Society and got a list of solicitors matching my search criteria. Eventually got a reply back from one who said yes they can do this.
So I do have that option to fall onto. At lawyer's prices
Anyway, apologies for the big screed. I don't see any stories anywhere else except this thread for other people having problems, so have to assume I did summat wrong somewhere.
If anyone has any words of wisdom, I'd appreciate that.