Live Update is unacceptably slow

I reinstalled the latest Norton Internet Security today and when it came to doing the Live Update, it is painfully slow. It take takes 3 mins to download 1mb (and the update is 300mb!)

I live in the UK and I have a superfast connection  - download speed is 75mb. Clearly there is an issue at Norton's end?

Anyone else experiencing the same problem or any way to speed up the download?