If the lawyers deposing him were any good....
This is NOT the case in the UK court involving Steele being sued for libel by someone named in the dossier.
I already see people in the comments confusing the two.
In this case in US court, BUZZFEED was being sued for publishing the dossier. That case was dismissed, but both Steele and Kramer were deposed by the plaintiff's lawyers.
"Great! Get me a signed statement from the head of the required agency by Monday proving that."
[under his breath] "Shit!"
That's *WHY* they were desperate to keep them sealed.
These are sealed while the case is heard, once it's over, no compelling reason not to unseal.
Steele & Kramer attempted to do that, and the judge wasn't convinced & ordered the unsealing anyway.