Mike Cavanagh at www.flyozone.com writes:

For those delegates that do not know me, I am Mike Cavanagh,
managing director/part owner of Ozone Gliders Ltd, full time pilot and part time
competition pilot. For those of you that do not know the history of Ozone, we
have always been pro serial class in Cat 1 competitions as we know that is a
guaranteed way of improving safety in any competition. In my position at Ozone,
I was the proposer of the serial class proposal that was decided upon and
accepted as a policy by the PMA (Paraglider Manufacturers’ Association).

...

This one is a "no brainer", (as we say in English) and any pilot/official who
argues that open class wings are safer than serial class wings are deluding
themselves (and trying to delude others in suggesting anything different). For
anyone to say that Open Class wings are safer than EN standard certified wings
makes a mockery of the whole idea of the safety in our sport being governed by
these carefully thought out EN standards.