It just seems like typical British humour to me. Obviously it wasn't meant to air (like the crazy weather report messages that came along with it). But it's pretty much apropos.
Why is the BBC apologizing? Manchester United only wins 42% of its matches according to FootyStats[0].
> Another message which appeared on the ticker read simply: "Weather rain everywhere."
Also accurate.
> An official BBC statement added: "There was a technical glitch during training with our test ticker, which rolled over to live programming for a few seconds.
I thought it was a direct quote from Erik ten Hag after observing his first training session