I've recently tried transferring my VDSL service from Plusnet to Shell Energy. My PN contract expires next month, and Shell have a special offer on and only require a 12 month contract.
They rang me to say they were unable to port my number, and would have to issue me a new one. My phone number has been in the family for decades, and I don't want to change it, so I cancelled the order.
I've posted on Plusnet's forum, but don't expect a reply over the weekend, but I wonder if anyone here has ported a number to Shell Energy successfully?