RIP Ian. I remember him well from his days in Bolton Speleo Club.

That's definitely Squirrel top right ... not sure about the others.

What a great picture! When Yordas main chamber is flooded there is very little in the way of a strong flow to sweep you away – the main chamber floods precisely because the downstream outlet is very restricted/choked. Many years ago, on a very wet day, we spent a fun afternoon swimming around...

Totally agree - Postojna IS amazing - it was still Yugoslavia when we visited ...:)