GrumpyGregry
Here for rides.
You must have better roads than we do on our club runs, with all the clubs I've been with 2 is the normal and occasionally a 3rd will go by (to get to the back or the front of the pack). You certainly wouldn't get 4+ easily up here on twisty trafficked roads.
It isn't the norm but it does happen, and it has happened on the lanes in vicinity of the 'incident' in the OP. On said roads I've even blocked potential overtakers where I've judged their Nissan Micra, or whatever, cannot do 20mph to 60 mph in 50 metres or 4 seconds, no matter how hard they chomp at the bit or lean forward in the driving seat, and is therefore likely to take one of my mates out if it all goes pear shaped.
Some of the newer