The news time on a Friday barely counts. The news at ten on Friday is so important the BBC never extended the length of their version on a Friday.
It’s been the case for ages now, on a Monday to Thursday that if ITV feel they have something of an extended length to show, then they will show it and push back News at Ten. The long term viewing figures are not effected in any way.
BBC News at Ten on a Friday leads into their one big post-News at Ten programme, The Graham Norton Show, so this is why the scheduling of BBC News at Ten is important on Fridays too.