An IP lookup for the site breatheinternet.com returns that the IP owner is NJP Services Limited.
I did a search on Companies House and a company with that name was dissolced in January of last year IF its the same company.
My advice to you would be to look for a phone number and give them a call before signing up.
Virgin (ADSL) => Namesco => Newnet => O2 => Plusnet => Zen => Newnet => Zen Lite 8000
Note: I don't lay turf for anyone. astro or otherwise, all views and opinions expressed are my own based on experience.