Hi there,
For some time our automated provisioning systems were built to submit 'Up to 19Mbps' 21CN orders with a capped upload (448kbps maximum). We have always been willing to uncap the upload speed on request though (up to ~1.3Mbps).
All orders are now submitted with uncapped upload where applicable.
I suspect your friend signed up before this change became commonplace. If they get in touch with us, then we'll sort it out for them -
http://www.plus.net/home-broadband/contact/
Note that our Fibre products have vastly increased upload speeds of up to 19.5Mbps.
Hope that helps.
Best regards,
Bob Pullen
Plusnet.