You can get a second line installed for £30, on an 18-month contract. You need to make 10 outgoing calls per month, but these can be included in the "Calling Plan", so free. So if you make 10 dummy calls once a month to the existing number, and answer them, ....
Click the "Learn about" link on
this page.
On that second line you can have Be.
The speeds on that would probably be as I said for the existing line, but that cannot be guaranteed. From the flat you have a cable which can normally carry two lines, but once that hits the first BT junction box it can take a different route to the exchange and have different stats. That is not usual, but happens quite often.
My broadband basic info/help site - www.robertos.me.uk
My domains,website and mail hosting - Tsohost.
Internet connection - IDNet Home Starter Fibre.
Live BQM.
"Where talent is a dwarf, self-esteem is a giant." - Jean-Antoine Petit-Senn.