a) and b) show the [Ti/Fe] – [Fe/H] abundance plots for the candidate Hercules stream and Arcturus group stars, respectively. Same markers as in Fig. 29. c) and d) show the cumulative age distributions for the candidate Hercules and Arcturus stars, respectively (coloured as in a) and b)). In c) the dotted black line represents stars with 7 < R_mean < 9 kpc and the dashed blue line stars with R_mean < 7 kpc (compare Fig. 26). In d) the dashed red line represents stars with TD/D > 10.