At 7:45, the single 5 at R2C5 was the next step for me. That gives you the 1,3,5 triple in Block 9 in R7C7, R7C8, and R7C9. It also gives you the 2 at R7C3. I recall it was fairly easy from there.
I have no idea how to see a way though on a grid populated with so many candidates. I got stuck myself at a point where I missed an easy pointing pair in a column. Anyway, I went through it again and finished it without notation in 14 minutes. Incidentally I couldn't quite see how the 7 was eliminated from R1 cells in box 8 after 16 minutes, though in fairness it didn't end up there. I think the 5 in box 5 was my first number, picking up the cell saw 8 different numbers at the outset.
At 7:45, the single 5 at R2C5 was the next step for me. That gives you the 1,3,5 triple in Block 9 in R7C7, R7C8, and R7C9. It also gives you the 2 at R7C3. I recall it was fairly easy from there.
I have no idea how to see a way though on a grid populated with so many candidates. I got stuck myself at a point where I missed an easy pointing pair in a column. Anyway, I went through it again and finished it without notation in 14 minutes. Incidentally I couldn't quite see how the 7 was eliminated from R1 cells in box 8 after 16 minutes, though in fairness it didn't end up there. I think the 5 in box 5 was my first number, picking up the cell saw 8 different numbers at the outset.
10 minutes notation free.