Faint part of the CMD of the Gaia DR2 20 pc sample after excluding 139 known WDs from Hollands et al. (2018) and 263 known UCDs from Bardalez Gagliuffi et al. (2019), Smart et al. (2019), and Reylé (2018). A closer zoom into the MS region at and below our UCD magnitude limit (dashed line) is also shown. Pluses (for objects with SIMBAD identification) and crosses (for objects not yet found in SIMBAD) mark 44 of our 50 new UCDs that have G − RP colours. The other coloured symbols and lines are the same as in Fig. 5. The new UCDs of latest type are marked by their photometrically determined spectral types (Sect. 3).