O2 I beleive own BE so they are one in the same.
I am with O2 for my broadband, I am not in an LLU area though so I am on the 8mb (£17 a month as an existing O2 Mobile customer) package. I had a load of issues since Christmas with slow evening and weekend speeds, but rang them and they knocked the price down a bit.
In the last week the speed has been awesome again and I got an email to say they have upgraded the whole of their network as takeup of new customers far exceeded what they could handle. But now they have fixed it, the speeds are awesome again (shame the price has gone up too back to non-discounted price)
Customer services are great too and all UK based people you end up speaking to.
