Not broadband, but when I moved the previous owner had energy supplied by them and I had the nightmare of dealing with this terrible company just to switch. They contacted me via a mobile number (shown as a dangerous on 'who called me') asking for all my personal details without giving me any details of who they had called or the property, and then when I asked to speak to the supervisor they hung up on me and followed up with a letter threatening a debt collector. They're an absolutely awful company and wouldn't touch them with a barge pole!
I see the dodgy practices of First Uselessity persist, albeit under the banner of Shell.
Tried to sign up my OAP mum, it’s a good deal as she needs international calls only to be told, you can’t keep your existing number, you’ll need a new one. The only company that said it, so having read the comments here in conjunction with that - No thanks Shell
Shell Broadband is provided by Shell Energy, which used to be First Utility (who were IMO & experience utterly useless). Do your homework and checkout some reviews before committing... https://www.broadband.co.uk/broadband/providers/shell-energy/reviews/ https://www.which.co.uk/reviews/energy-companies/article/energy-company-reviews/shell-energy-aTQRm2q6tNEm .
If you want landline (I know not many do) tack on an extra £5 a month