> The algorithm was buggy because the input data is a nightmare. No, the algorithm was "buggy" because it didn't account for the entry to and exit points from

> The algorithm was buggy because the input data is a nightmare. No, the algorithm was "buggy" because it didn't account for the entry to and exit points from the UK to have the same designation because they're supposed to be geographically distant (they were 4000Nm apart!) and the UK ain't that big.