Effective temperature versus stellar age diagrams for the GES iDR6 sample of field stars discussed in this paper, divided into inner disc (top panel, 619 stars), solar vicinity (middle panel, 2129 stars), and outer disc sub-samples (bottom panel, 462 stars). Stellar ages were determined from isochrone fitting using the aussieq2 code and YaPSI stellar models (Spada et al. 2017). Stars with lithium measurements are colour-coded according to their ⁷Li abundance. Grey dots represent upper limits.