By Ashleigh Rainbird The garden of George Clooney’s lovingly restored British mansion has an unplanned water feature after the Thames broke its banks. Continuing heavy rain bodes badly for the £15million pile – which has a cinema, a wine cellar and a now-superfluous swimming pool. Clooney, 62, star of the Ocean’s movies, moved into the house in Sonning, Berks, with lawyer wife Amal, 46, in 2016 after 18 months of renovation work. But the couple have spent the past few months at their £7m property near Bignoles, southern France, where they were seen out in the sun. Earlier this year, their mans…