Storm Lilian will usher a Bank Holiday weekend of autumnal wind and thundery downpours before summer surges back for a last fling. Lilian became the twelfth named storm of the season on Thursday night, swept in from the Atlantic on an ‘active’ jet stream. Cooler wetter weather will hang on in the north through the start of the weekend while a nationwide split pushes temperatures in the south into the 20Cs. However, sun-starved Britons can look forward to summer’s sizzling comeback at the end of August as tussling pressure patterns will give way to a sultry tropical surge. Met Office meteorolog…