Left panel: distribution of observable GRB starburst host galaxies with total flux above 10 μJy at 1.4 GHz per square degree, per redshift, dn_gal(z)/dz, in redshift bins of 0.1 width taken from the SKA Simulated Skies. Middle panel: integrated number of observable GRBs per square degree per year from z to z_lim = 6 assuming an internal emission rate of R_int = 10⁻⁴ per galaxy per day (solid line) or R_int = 10⁻⁵ per galaxy per year (dashed line). Right panel: integrated number of observable multiply imaged GRBs per square degree per year out to z_lim from 0.1 to 6.0 according to Eq. (6).