Given the increased number of threads about reporting others and advice to ring the police etc, it makes sense.
The curtain twitchers and mini dictators can happily type away with glee that they're doing their bit.
101 and 999 lines remain free to deal with real emergencies.
If serious reports come in i.e. pub lockdowns,football games ,other mass gatherings etc they can be dealt with if necessary,possibly in a more timely manner if a certain pattern emerges.
But mainly it will free up resources if all the curtain twitchers pool their efforts into a specific direction,preferably online.