Common & Lesser Whitethroat, Chiffchaff, Willow Warbler, Blackcap, Orange Tip, Holly Blue, Speckled Wood, Green-veined White and a few Swallows. Also the remains of 12 packs of Peroni, Heiniken & Carling including all the cans. These people can be bothered to carry it there but not back, when it’s a fraction of the weight.
Garganey pair apparently still at Cossie.
Glamorgan Bird Club 
I once found a tent right on the top of Rudry Mountain , full of empty cans, thought someone would collect it (rather naively) and it sat there for a week before the Council collected it -Perhaps the government should consider minimum pricing for camping equipment as well as alcohol!!