The individual said that his human rights would be breached in France because asylum seekers get no support there, and also that he was a victim of trafficking and needed more time to get evidence of that.
The HO said his human rights would be perfectly fine in France, and if he was a victim of trafficking he could submit his documents to the NRM (the trafficking assessment system) from France once removed.
Unfortunately during the hearing itself, the HO barrister received an email from the NRM saying "actually we can't accept documents from abroad."
At that point, they had to accept that their original claim that he could submit from abroad was bound to fail.
The Times reports that the judge dismissed the human rights argument. He's granted interim relief so that the applicant can get his evidence of trafficking and submit it in-country.