We study the asymptotic behaviour as t → T–, near a finite blow-up time T > 0, of decreasing-in-x solutions to the following semilinear heat equation with a non-local term:
![](//static.cambridge.org/content/id/urn%3Acambridge.org%3Aid%3Aarticle%3AS0308210515000256/resource/name/S0308210515000256_inline1.gif?pub-status=live)
with Neumann boundary conditions and strictly decreasing initial function u0(x) with zero mass. We prove sharp estimates for u(x, t) as t → T–, revealing a non-uniform global blow-up:
![](//static.cambridge.org/content/id/urn%3Acambridge.org%3Aid%3Aarticle%3AS0308210515000256/resource/name/S0308210515000256_inline2.gif?pub-status=live)
uniformly on any compact set [δ, 1], δ ∈ (0, 1).