The Brits said it was TOP SECRET!!!!
"Within the last hour we received what appears to be an official British TOP SECRET signals intelligence document dated Nov. 17, 2016, showing that President Obama and his National Security Advisor, Susan Rice were the ones who first requested electronic spying on the candidate Donald Trump, just 7 days after Trump won the Republican nomination in late August, 2016. "
WikiLeak it...
The Brits IIRC do not use the term Top Secret. Most Secret is their term of choice.