  We report follow-up observations of four transiting exoplanets, TRES-2b,
HAT-P-22b, HAT-P-36b and XO-2b, as part of the Original Research By Young
Twinkle Students (ORBYTS) programme. These observations were taken using the
Las Cumbres Observatory Global Telescope Network's (LCOGT) robotic 0.4 m
telescopes and were analysed using the HOlomon Photometric Software (HOPS).
Such observations are key for ensuring accurate transit times for upcoming
telescopes, such as the James Webb Space Telescope (JWST), Twinkle and Ariel,
which may seek to characterise the atmospheres of these planets. The data have
been uploaded to ExoClock and a significant portion of this work has been
completed by secondary school students in London.
