Macron calls snap parliamentary election after crushing loss to far-right in European election .
Exit polls show Marine Le Pen’s National Rally are set to trounce Macron’s party in a historic win for the party
The French parliamentary elections will be held on 30 June and 7 July
Far-right parties have also made substantial gains in Austria and Germany, exit polls say
The first projection of the European Parliament shows that the centre-right European People’s Party is still the strongest grouping
About 360 million eligible voters are choosing 720 new Members of the European Parliament (MEPs)