Shabana Mahmood will use new powers to ban support for the group, which has been linked to death threats and intimidation on British soil.
The UK is trying to extradite a man after his wife and two daughters are found dead in Bedfordshire.
The former official was fired in April over Lord Mandelson's vetting to be the UK's ambassador to the US.
The main parades are being held in 18 venues across all six counties, with villages, towns and cities taking their turn to host their neighbouring lodge members.
Most deaths will have occurred in the June heatwave, experts say, when a rare red heat alert was issued.
Seaton Carew residents say lifeguards should cover the beach outside the school summer holidays.
