It was the BBC that didn't really anchor on location much, if at all. The first memory I've got is from, I think, 1999. Didn't the last day of the virtual era have some bulletins anchored from Edinburgh? I really don't recall as much on location presenting from the BBC as ITN - they seemed to pioneer it, really.
Yes, Martyn Lewis presented the Six from Edinburgh for his last bulletin, the day after the first elections to the Scottish Parliament.
As I say, the Beeb didn't really do much because there were separate departments within the Beeb who all had their own fiefdoms. As well as events there was also current affairs, responsible for programmes like Nationwide, Panorama and indeed the party conference coverage, while news were responsible for news bulletins (they were physically separate too, with news at TV Centre and current affairs at Lime Grove). So if the news was being anchored from the party conferences that would presumably tread on the toes of current affairs, so they didn't do it.
There were rare occasions of outside broadcasts. Michael Buerk presented the Nine from Washington in 1988 for the US elections, and Peter Sissons mentions "the only three times" he did it in his autobiography, which were Dunblane in 96 (A short clip of this was seen in his recent obtiuary, but I've never seen the full bulletin), during the Lewinsky scandal in 98, and Concorde crash in 2000.
Although, I think Sissons misremembered part of it, because he talks about having technical difficulties during the 1998 example, and saying George Alagiah was ready to take over in the studio if needed. I'm guessing this was actually the case for during Concorde, as I don't think George ever presented in the Virtual era, unless I'm mistaken?