Perhaps it would be more accurate if BT's sign said "Fibre broadband stops here"
Ironically there's a Virgin Media cabinet around the corner which has been fiber fed and delivering broadband for years, so it's not even as if there is anything new "here."
Double FAIL for BT advertising.
BT telephone exchanges have been fibre-fed for years - previous generations of DSL broadband have been delivered from DSLAMs in the exchange served from a fibre-optic network, so the claim that there is something new, different (or better) about their latest roll-out is tenuous at best yet the regulators don't seem to think the public are being misled.