The 'pob', style that says you're in charge: Political bob is the chosen haircut for powerful women including Theresa May, Hillary Clinton and Angela Merkel

The Prime Minister's hairstyle (top right) is the must-have 'power cut' for females in charge. Known as the political bob - or pob - the feathery, usually blonde, swept back look is now the favoured style of powerful women across the globe. 

White House hopeful Hilary Clinton (top left) has a perfectly coiffured, highlighted version of the pob, while SNP Leader Nicola Sturgeon (below right) and German Chancellor Angela Merkel (below left) prefer a shorter cropped, schoolboy style. Hairdressers say the 'pob' is being used by female politicians to demonstrate they are in charge and mean business.