So 10 cyclists long in a group / train. Much easier than single file if you’re giving them the correct width.
There is only 1 A4 to Marlborough, and the turn direction to town tells me your direction. Not wishing to start an argument but you might be stuck there due to poor driving ability further up the queue.
Back on the off topic of cyclists, I think they should leave gaps for the cars to pull back in & the good clubs I see when driving locally tend to do so and purposefully vs it being an accidental set of gaps. Helps everyone live without frustration on the same tarmac.