Thin yellow stripe = fibre.
I was very lucky when my drop wire being replaced got me back to 80/20, but back before Openreach when I was on Digital Region I was on 100/30, so it still feels kinda surreal to have been on a downgrade for so long.
Of course I'm hardly in a bad position now, thanks to 5G which is another level of surreal, but its far too unreliable to use on a day to day basis so very much looking forward to FTTP.