The example given by Chief Inspector Morse was the confrontation between Sherlock Holmes and Professor Moriarty at the Reichenbach Falls.
Had it happened in the late 1990's, according to Morse, the area would have been surrounded by police warning tape and the situation would have been commandeered by a hostage negotiator.
There was no mention of Conan Doyle. There was no inference that it was a fictional story. (But that could be splained away if needed.) Morse spoke of the Reichenbach incident as if it really happened.
And in Toobworld, Morse and Holmes do share the same universe. It's to be hoped that the same holds true in BookWorld, and in the Wold Newton Universe as well.....