Full-scale Gaia EDR3 colour-magnitude diagram (grey dots) with the known hot subdwarfs DR3 (cyan crosses). Due to the unreliable absolute G magnitudes of the remaining 2877 objects, only the 3373 objects from the DR3 catalogue of known hot subdwarfs that conform to the astrometric and photometric selection quality criteria (see Table 1.) are plotted. Here we can see the EHB cluster of sources at (G_BP – G_RP) –0.35, G_abs 4.5 and the extended cloud of hot subdwarf plus main sequence binaries towards (G_BP – G_RP) 0.5, G_abs 3.0.