Let $g: [0,T) \to \Gamma(S^2T^*M)$ be a compact Ricci flow on a compact manifold $M$, with $T<\infty$, and suppose $|\operatorname{Rm}|$ blows up at $T$. Choose points and times $(x_j,t_j)$ with $t_j\uparrow T$ and set $\lambda_j=|\operatorname{Rm}(x_j,t_j)|\to\infty$. Define
If the rescaled flows have uniform curvature bounds on compact pointed parabolic neighbourhoods and satisfy the basepoint compactness noncollapsing condition that there exists $\iota_0>0$ with
for all sufficiently large $j$, then a subsequence converges on compact backward intervals $[A,0]$ with $A<0$ to a complete pointed ancient Ricci flow $(M_\infty,g_\infty(s),x_\infty)$ up to its terminal time $0$, and