Why do eng, scotland, northern ireland and wales have seperate football teams?

i might seem nuts to waste points by asking this question again but many political unions with devolved form of govt (the UK's official status) including UAE and USA have only a single team to represent themselves at international sporting events. as a matter of fact in sports other than football, such as ... show more i might seem nuts to waste points by asking this question again but many political unions with devolved form of govt (the UK's official status) including UAE and USA have only a single team to represent themselves at international sporting events. as a matter of fact in sports other than football, such as rugby, cricket and hockey, northern ireland and the republic of ireland are represented by a single team (simply named ireland) despite them being 2 distinct political entities (unlike the UK i might add, which is recognised as a single political entity). any answers?????????????????????????????????...
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