  We present time-series photometric observations of thirteen transits in the
planetary systems WASP-24, WASP-25 and WASP-26. All three systems have orbital
obliquity measurements, WASP-24 and WASP-26 have been observed with Spitzer,
and WASP-25 was previously comparatively neglected. Our light curves were
obtained using the telescope-defocussing method and have scatters of 0.5 to 1.2
mmag relative to their best-fitting geometric models. We used these data to
measure the physical properties and orbital ephemerides of the systems to high
precision, finding that our improved measurements are in good agreement with
previous studies. High-resolution Lucky Imaging observations of all three
targets show no evidence for faint stars close enough to contaminate our
photometry. We confirm the eclipsing nature of the star closest to WASP-24 and
present the detection of a detached eclipsing binary within 4.25 arcmin of
WASP-26.
