Left: the star formation rate and escape fraction as function of time for a reference galaxy of 10⁸   M_⊙ with λ = 0.05, f_gas = 0.5 and z = 11 resimulated at mass resolution of 250 M_⊙. Shown are the escape fraction with no delay in ionising luminosity (solid line), with a delay of 0.5 Myr (dotted line), with a delay of 1 Myr (dashed line) and with a delay of 5 Myr (dashed-dotted line). Right: ratio of the escape fraction without delay in ionising luminosity and with delay as function of the delay time.