the EU parliament is analogous to Congress (the EU council of ministers - with its spokeperson Donald Tusk is analogous to the Senate with veto powers and the EU commission (Junckers) is the US civil service.
The EU parliament has elections every 4 years and these guys are based on population - so the UK has 73 out of 570 odd MEPs
The elections will be for these 73 MEPs - last time around, in 2015, there were 8 UKIP MEPs elected - one of whom was Nigel Farage
