Actual English English.
Translation to American: The BBC website was down for some time overnight Dec. 31 due to a Distributed Denial Of Service attack (DDOS).
That is when somebody or a bunch of somebodies (and usually their hacked army of infected bot computers worldwide) get together and try to flood a server with so many requests it cannot function and service is disrupted.
A SERVER HACK ATTACK, if you would. Let Jer explain it to you, it's a b---- for IT folks and extremely important.
I think they were back in control and partying again by 2 am.