my %london = (
    'Area'          =>  1572,       # Sq Km
    'Population'    =>  7_556_900,
    'Elevation'     =>  24,         # m
    'Time_Zone'     =>  'GMT',
    'Mayor'         =>  'Boris Johnson',
    'Long'          =>  '0.1275°W',
    'Lat'           =>  '51.50722°N',
);

my @lat_long = @london{'Lat','Long'};