Purged according to who? If the Times cited a source, it was in the section of the article protected by the paywall.
Was the source an unnamed GCHQ official? An anonymous FSB source, or was it published in Izvestia?
The trouble with this war is that there are literally zero credible sources.
Very few posters here want to take the time to do their own research into this military operation. It’s so much easier to let the media just shovel it in.