[Kojak]

I know that the two of them both presented News 24 during the flags era (I think covering Krishnan's slot after he left for C4), but he must surely have done some lower-ranking nationals stuff before they appointed him as a regular part of the nationals team?

I'm sure I remember reading at the old, old place that Huw did fill-in stints on Newsnight before eventually joining the national bulletins. This would have been around 1997.

EDIT:

There was a period in the summer of 1997 when Huw Edwards and Gavin Esler between them presented Newsnight for about six weeks, with all the regular presenters absent, which I remember reading was to give them more experience in presenting as they were going to be doing a lot of it on News 24 when that launched.

I wouldn't say their presence in 1997 was so unusual, Jon Sopel and, when we see the Six, Diana Madill were about the same level at that point.

tvforum.uk 

As for Krishnan - so the story goes, he had his C4 contract biked to him at TVC and he signed it whilst on air!