A combination of political, religious and social differences plus the threat of intercommunal tensions and violence has led to widespread self-segregation of the two communities.
[6] However, both the Catholic Church and Protestant denominations, along with state-run institutions, have supported and organised cross-community school projects such as joint field trips, educational classes and forums wherein pupils can come together to share their beliefs, values and cultures.
As a result, Northern Ireland's demography shifted further in favour of Protestants leaving their ascendancy seemingly impregnable by the late 1950s.
[11] The British government has introduced numerous laws and regulations since the mid-1990s to prohibit discrimination on religious grounds, with the Fair Employment Commission (originally the Fair Employment Agency) exercising statutory powers to investigate allegations of discriminatory practices in Northern Ireland business and organisations.
[14] It was estimated in 2004 that 92.5% of public housing in Northern Ireland was divided along religious lines, with the figure rising to 98% in Belfast.
[15] In response to inter-communal violence, the British Army constructed a number of high walls called "peace lines" to separate rival neighbourhoods.
[17] The effective segregation of the two communities significantly affects the usage of local services in "interface areas" where sectarian neighbourhoods adjoin.
The law was extended to cover the provision of goods, facilities and services in 1998 under the Fair Employment and Treatment (Northern Ireland) Order 1998.
[25] An Equality Commission review in 2004 of the operation of the anti-discrimination legislation since the 1970s, found that there had been a substantial improvement in the employment profile of Catholics, most marked in the public sector but not confined to it.
It said that Catholics were now well represented in managerial, professional and senior administrative posts, although there were some areas of under-representation such as local government and security but that the overall picture was a positive one.