Thanks for that. Mmm not sure who if anyone has a pond that I know of in work, will ask about though.
Realised that the, what I thought was flukes are prob flat worms of some sort. Black and about 3mm to 10mm in length. Will they eat these? (although they are nearly as big as the newts!)
My tank is 40cm by 25cm by 25cm. There are also many water lice and I've seen one young water boatman. Could the boatman be a risk as they are carnivorous aren't they?
Also I'm wondering on the laws regarding having the newts, do I need to declare that I have them or should I just look after them?
Thanks.