I just found this story about the first Irish theme pub in Britain, which began in Liverpool (where I spent my first year in Britain) in 1984.
It opened just after I left. Perhaps surprisingly there weren’t many Irish pubs in Liverpool compared with Manchester, Leeds or Birmingham back then, even though a large proportion of the population considered themselves of Irish origin. There were plenty of reminders of home in the familiar paramilitary slogans on the streets. The Orange Order marched that year from sometime in March until November, without any communial rancour that I recall.