Yesterday 18th February 2019 it was announced that a high ranking British civil servant Charles Farr had passed away due to a short illness.

https://www.gov.uk/government/news/whitehall-loses-one-of-its-best-and-brightest-charles-farr

Farr was Theresa May's right hand man on security issues and in April last year the twitter account Undecover Huber (https://twitter.com/JohnWHuber/) speculated that Farr was someone Steele passed his dossier to in the UK government.

https://twitter.com/JohnWHuber/status/989243767084503041

Farr previously came to the media's attention when it was revealed he was in a relationship with one of Theresa May's spin doctors.

https://www.dailymail.co.uk/news/article-2649035/The-discreet-affair-two-Home-Secretarys-closest-advisers-REAL-reason-bitter-split-Cabinet-colleague-Michael-Gove-Islamic-plot-schools.html