We will soon live in an era of fantastic wide-field telescopes such as LSST, that are able to study vast areas of extra-galactic sky, discovering thousands of transient objects a night. Studies show that when using the transient objects Type Ia Supernovae (SNeIa) as cosmological distance indicators, our photometric-redshift estimates are bias, favouring lower photometric redshift estimates and redder colours in the limits of low signal to noise data. These studies and others point to a need for spectroscopic follow-up of SNeIa surveys, so we can better understand our biases, obtain reliable training samples for the next generation of light-curve fitters and to perform high precision cosmology. I will present a talk on the Time Domain Extra-Galactic Survey (TiDES) who have secured 250,000 fibre hours on 4MOST to spectroscopically follow-up SNeIa and their host galaxies. I will discuss our science aims, survey strategy and our current and future work, as well as detailing my own role and work done within the survey.