Over the course of the past three years, the UK government has offered up £2.5 billion of financial support and flexibility for the Northern Ireland Executive. The UK government is committed to ensuring the needs of Northern Ireland and this is likewise properly reflected in the future UK shared Prosperity Fund, which will not only benefit Northern Ireland but all parts of the UK.
Thus, if Britain truly did not care for Northern Ireland, why would they keep providing financial support to the region? If Britain truly did not care for the future of Northern Ireland, they would have encouraged their independence or reunification with the Republic of Ireland. Instead, Northern Ireland remains supported despite featuring the highest poverty rates in the UK. 
Therefore, it is clear that Britain does truly care about the destiny of Northern Ireland.