  The effects of colour reconnection (CR) at $\mathrm{e}^+\mathrm{e}^-$
colliders are revisited, with focus on recently developed CR models. The new
models are compared with the LEP2 measurements for $\mathrm{e}^+\mathrm{e}^-
\to \mathrm{W}^+\mathrm{W}^- \to\mathrm{q}_1 \overline{\mathrm{q}}_2
\mathrm{q}_3 \overline{\mathrm{q}}_4$ and found to lie within their limits.
Prospects for constraints from new high-luminosity $\mathrm{e}^+\mathrm{e}^-$
colliders are discussed. The novel arena of CR in Higgs decays is introduced,
and illustrated by shifts in angular correlations that would be used to set
limits on a potential $CP$-odd admixture of the 125 GeV Higgs state.
