Left panels: position of the 20 known RR Lyrae stars listed in Table A.2 on the G vs G_BP−G_RP CMD of UMi’s RGB members (cyan, orange, and red symbols) and the Gold sample RR Lyrae stars (black filled circles). The mean magnitudes and colours of the 20 RR Lyrae stars are from the DR3 vari_rrlyrae table (orchid filled circles) and from our analysis of the Gaia time series data for V9 and V47 (violet filled circles); Spatial location (bottom) and proper motion distribution (top) of the 20 RR Lyrae stars (orchid filled circles) using the Gaia DR3 astrometry. Right panels: same as in the left panels, but for the 47 RR Lyrae stars that we confirm to be new members of UMi (see Sect. 5.2). V103, V117, V120, V125, and V156 are discussed in the text. The lime filled triangles show V117 and V125 plotted adopting their G_BP and G_RP magnitudes from the Gaia DR3 main catalogue.