On Monday, August 10, 2020 at 7:44:49 PM UTC+1, Pamela wrote:

The proposed amendment to the Highway Code will say "[cyclists
should] ride in single file when drivers wish to overtake and it is safe
to let them do so". Which essentially confirms that old rule.

If you read the story, the cyclists moved into single file to let the van driver past. Why they then decided to pass by at high speed very close while leaning on their horn, only they will know. Totally unnecessary behaviour.