  We determine the ground state meson masses at low temperature using
simulations with $2+1$ flavours of improved Wilson-clover fermions.
Subsequently we study the effect of increasing the temperature of the hadron
gas, including the transition to the quark-gluon plasma, as well as the
restoration of $SU(2)_A$ chiral symmetry. We use the FASTSUM anisotropic,
fixed-scale Generation2L ensembles and consider mesons with light, strange and
charm content.
