PN-20 would be good. When I saw Mike the EMA director in January, he said the new siren was not yet approved. He's been wanting to replace it for a couple years. That will be interesting, a yellow 508. So yes, it would be good to record it again, but I don't think you need to rush either. If the weather is ok then go for it. If not, next month.
If there is any interest, I can try to record one of our E-Classes with the Tempest recording tomorrow. I have to see, I should be able to.