Ok, so the green bike is obviously an Armstrong MT500, though this one's a bit odd, in that it was originally red, and has alloy akront rims. Would it have been for ceremonial duties, or RMP? Anyone any ideas?
As for the other two, the orange one at the back is a Dnepr model 11, of 1982 vintage, and came with a right hand sidecar, which I can only describe as a hippy wagon. It is painted orange with a "Peace and Love" and a painting of a Llama on it. WTF!

You are indeed exactly right, the blue bike is a model 66 Ural with a Dnepr tank, this time of 1973 vintage. The guy I bought it from was going to café racer it, but thankfully didn't, as its in great order and even has the original K301 carbs fitted.
In the last couple of years, I've gone a bit mad buying bikes. Basically anything unusual, interesting, and more importantly cheap

I don't go looking, they just come my way, but I've had to wise up as I've way too much stuff, no more room, and funds are drying up. In the past few weeks I've had to pass up on an SRX400, a Yamaha Serow, a Suzuki DR250 Djebl, and a really rough seized XBR.
Thanks for your offer Steve, I will PM you with details.