  The ESA Ariel mission has been adopted for launch in 2029 and will conduct a
survey of around one thousand exoplanetary atmospheres during its primary
mission life. By providing homogeneous datasets, with a high SNR and wide
wavelength coverage, Ariel will unveil the atmospheric demographics of these
far-away worlds, helping to constrain planet formation and evolution processes
on a galactic scale. Ariel seeks to undertake a statistical survey of a diverse
population of planets and, therefore, the sample of planets from which this
selection can be made is of the utmost importance. While many suitable targets
have already been found, hundreds more will be discovered before the mission is
operational. Previous studies have used predictions of exoplanet detections to
forecast the available planet population by the launch date of Ariel, with the
most recent noting that the Transiting Exoplanet Survey Satellite (TESS) alone
should provide over a thousand potential targets. In this work, we consider the
planet candidates found to date by TESS to show that, with the addition of
already confirmed planets, Ariel will already have a more than sufficient
sample to choose its target list from once these candidates are validated. We
showcase the breadth of this population as well as exploring, for the first
time, the ability of Ariel to characterise multiple planets within a single
system. Comparative planetology of worlds orbiting the same star, as well as
across the wider population, will undoubtedly revolutionise our understanding
of planet formation and evolution.
