Thanks a lot guys your comments are really appreciated
Thanks
I am suprised you mention the shadow as a bad thing? These were taken because of the shadow for two reasons. One that it adds dark and light contrast to the whole scene and two that had the water not been in shadow you would not have got the strong green reflections which for me is a pleasent effect. Had the whole scenes been in direct light they would have flat and boring and for me not be worthy of an image.
Yes this is Llyn Glas. Have to say it's one of the most beautiful spots I have seen in Snowdonia and very photogenic. I have wild camped by it a couple of times now and done two different approches. One from one of the car parks in the pass directly north of crib goch and one from pen-y-pass car park cutting across the north east face of crib goch. Both were quite scrambly and airy which is quite unnerving with a (tent,camera and camping gear) heavy pack on your back which makes you rather unbalanced.