According to Spanish traffic laws, once the first member of a group of cyclists (rightfully) enters a roundabout, then the whole group as has the right to enter together, and does not have to give way to other vehicles in the roundabout.
I can see the sense of that, but the problem is when
they enter roundabouts: they should wait until the road is safe, as does every other form of traffic (officially if not in practice!). I see the obvious danger of a pile-up, but that is simply a measure of the crazy system of bunching. These guys fall off even during races when there is no other traffic anywhere on the road: they are incapable of recognizing the obvious limitations of response times, cycle brakes and stability. That's a further reason why I gave up riding motorcycles, for which I still hold a licence. They are even worse than cycles!
There's a road up in the northern mountains forming that coast of Mallorca, the Tramuntana range, and the road through them, in winter, is beautiful. It's very tight, though well surfaced, and Sunday is when the motorcycle lads take to it to enjoy their 'sport' and the first thing you notice is this: when a motorcycle comes towards you on a right (for you) bend, though the wheels are usually on the correct side of the central line, the body of the rider is often right over in your half of the road because motorcyclists lean into corners...
Come summer, avoid it at all costs: get behind one tourist coach and you can spend the next ninety minutes right there, enjoying the diesel. Petrol head conditioning?
Nice to see you posting again, Eduardo.