Can you help to identify these frames, bikes or parts?

Agree, unlikely to be Columbus with those lugs
one thing i forgot, take the back wheel out and measure the distance between the insides of the dropouts (where the hub parts rest)
if 120mm suggests British 70s 5spd
if 126mm, still unclear
if 130mm it's been stretched

Thanks again Ben, I'll measure them when I get chance to have the wheels off - probably Friday night - riding home in five ;0)

If it is 120mm and I can identify the lugs as Nervex, where would that point next in order to try to narrow it down further?

Cheers,

Mat