It depends on whether you are going to Infinity or not. If not, there shouldn't be any problem. (But why would anyone go to BT broadband except for Infinity?)
If you are going to Infinity or any competitor's FTTC, you must have a VDSL modem. Most modems are ADSL only, with a couple of expensive devices such as FritzBox being integrated VDSL modem and router.
Moved (with trepidation) to BT Infinity 2 for upload speed. Happy BE user for several years.