It could involve "research, warrants and so on" but if the UK builds up a large enough intelligence capacity [1], Those warrants and research can be mass proces

It could involve "research, warrants and so on" but if the UK builds up a large enough intelligence capacity [1], Those warrants and research can be mass processed and then how is this different from a filter? It might not be dumb but it is still a filter. [1] This might not be true, but I feel that Englands intelligence capacity per capita is far greater than any other country in the world.