Redshift drift in radially inhomogeneous Lemaître-Tolman-Bondi spacetimes

We provide a formula for estimating the redshift and its secular change (redshift drift) in Lema\^{\i}tre-Tolman-Bondi (LTB) spherically symmetric universes. compute scaling of drift LTB models that predict Hubble diagrams indistinguishable from those standard cosmological model, flat lambda cold dark matter ($\mathrm{\ensuremath{\Lambda}}\mathrm{CDM}$) model. show these degenerate is typically different predicted $\mathrm{\ensuremath{\Lambda}}\mathrm{CDM}$ scenario. also highlight discuss some unconventional redshift-drift signals arise universes give them distinctive features compared to argue metric observable allows us reduce degrees freedom make more predictive thus falsifiable.