ummmm
Since you did not provide a link yourself, I took the opportunity to research your Northampton stabbings myself.
Apart from them taking place nearly 4 years ago, there was only only 6 and not 7 (none fatal) stabbings.
There was no mention of the colour of the stabbers or their victims, but they did mention that it did involve a number of people who had come to Northampton from London, make of that what you will.
/// The trouble involved a number of people who had come to Northampton from London for a pre-arranged evening out, police said. ///
And it was reported on by no less than the BBC.
https://www.bbc.co.uk/news/uk-england-northamptonshire-30446364
Not done too well out of all that, have you?