You can get routers with VDSL modem (fibre optic port) builtin, but pretty expensive. FritzBox is one, and a Draytek (£239 or so), and I think there are a couple of others.
They don't always behave as well as the modem Openreach supplies. VDSL standards are still 'flexible' enough that you usually get best results by using the same manufacturer for the modem as the cabinet uses; Openreach usually provide a modem to match the cabinet you are connected to.
Moved (with trepidation) to BT Infinity 2 for upload speed. Happy BE user for several years.