User blog comment:CrashBash/Top 10 Mistakes Robot Wars made that made the UK Championships less enjoyable/@comment-9751413-20171206173626

Cold weather is more of an issue with the BBC wanting the show at a certain time. It takes 4 months from filming to broadcast, and if they want it in April, you have to film in December. There is no escaping this. Yeah, it was a major problem for the series', but it's not one that could be avoided.

Also I can't work out whether that's based on Series 8 or 9, as both had a larger issue anyway.