Northern Ireland Secretary Theresa Villiers told the House of Commons there was nothing British about the 'thuggish, lawless and despicable" behaviour of loyalist protesters. She said:
"There is nothing remotely British about what they are doing; they are dishonouring and shaming the flag of our country with their lawless and violent activities.They discredit the cause they claim to support."
Her comments came as the First Minister of Northern Ireland Peter Robinson said two senior members of his party were issued with death threats. Marc Mallet reports from Belfast.
More top news
Milder Atlantic air into the north with colder, Continental air into the south.
A report produced for the British government criticised the security at the Riu Imperial Marhaba hotel where 38 people were killed in 2015.
A second Scottish independence referendum is "even more likely" after Theresa May's Brexit speech, Nicola Sturgeon has said.