WASP-106 photometry and radial velocities. Upper panel: phase-folded photometry from SuperWASP-N and WASP-South. Data are binned in phase with a bin-width equal to 120 s. Middle panel: high-precision follow-up photometry. Each light curve is offset in flux for clarity, and binned using a 120 s bin width. The light curves are identified with the same numbers as those in Table 2. Our best-fitting model is plotted with a solid line and TRAPPIST’s meridian flips are marked with dashed vertical lines. Lower panel: RV measurements from CORALIE and SOPHIE, along with our best-fitting MCMC solution (solid line). The CORALIE point taken during transit and excluded from our MCMC analysis is shown in grey. The centre-of-mass velocity, γ = 17.24744 km s^-1, has been subtracted, as has the fitted offset γ_{COR − SOPH} = −59.57 m s^-1 between the two datasets.