Spatial variation of the disc fraction in a Cygnus OB2-like FUV field environment. The top panel shows the temporal evolution of the disc fraction in the different regions of the 2D projected FUV field for both the viscous and MHD wind-driven scenario. The coloured histograms in the bottom panels show as a function of ${\left|{ℱ}_{\text{FUV,CygnOB2}}\right|}_{2\text{D}}$ the fraction of stars with discs at a fixed moment in time of 4 Myrs, indicated in the top panels by the vertical dashed line. The dashed lines in the histograms show the disc fractions of Cygnus OB2 obtained observationally by Guarcello et al. (2016). The solid white lines show the disc fraction in the actual (3D) FUV field in the simulation.