$\rho^{\rm UE}$ distributions normalised by the number of events in each centrality class in data calculated in the $\eta$-band with $\Delta R_{\text{UE gap}}=0.1$ out of an isolation cone centred at inclusive clusters with $p_{\rm T} > 10$ GeV/$c$. Left: for Pb$-$Pb collisions and the cone radius $R=0.2$ as a function of centrality. Right: for pp and Pb$-$Pb collisions for different centrality classes for the cone radius $R=0.4$.