I was reading all the articles about it last night.
It was reported that the police investigated the accident for 2 months before people were arrested in November, & they have only just been charged now.
It was stated that witnesses claimed that they had to take evasive action to avoid being hit by the convoy of riders.
If that is the case & they were riding irresponsibly or dangerously as a group then yes they will be charged as a group, so sad tho that it has lead to a couples death