[Stooky Bill]

How many counting centres are there - obviously 600+ constituencies but usually multiple results are announces at one venue. You'd imagine they'd trust fibre for the non-flagship seats but this will be an election with a few Portillo moments expected.

There won't be a fibre from those locations, they're only installed into locations that will have regular OBs. Unless the counts are at a sports ground or concert venue then there won't be any permanent connectivity. It's not worth installing anything temporarily for one night.

Big events like The Eurovision Song Contest have fibre nodes installed, but they're big, week long events that require multiple high bit-rate video feeds.

So any coverage of declarations will be either some sort of satellite connection (either traditional SNG or an IP VSAT based solution) , bonded cellular or via Internet. The last two of course will mean having to compete for bandwidth between the broadcasters and other users. Using the venues existing network might be enough depending on how many broadcasters are present. It's possible with LiveUs to use a combination of ethernet and cellular

As for how many counting places, that's a good question. It won't be as many as 300, often there's 3 or 4 in one centre.