Bees at Trosley

While out with the British Butterfly Conservation Society Kent group at Trosley Country Park, I saw a lot of mining bees flying fast and low over the sparse grass of several areas of the chalk downland. Most of these were probably Andrena flavipes, the Yellow Legged Mining Bee. 

However this male appears to have a slightly reddish tail, and I think might possible be a male Andrena chrysosceles 

This I am fairly sure must be Nomada fucata, the cuckoo bee of Andrena flavipes.