In my area of London ,they often roll up in rows of caravans and take over public parks /green areas ,staying for a while until the police try to evict them . The government gives them some designated areas to live .Some live in normals homes and are referred to as settled travellers. They have family qabils (McDonagh etc )a bit like Somalis .Those Irish Gypsies are unrelated to the Indian descent Gypsies in Europe.
The Irish ones are some kind of native caste gone rogue rather than being from India like those other ones.