Rear first yes, but note that at the front, the spring fouls the bulkhead and so may need compressing to get the shackle pin in.
Also fit the spring with the rear shackle attached to the spring.
I think I loose fitted the axle before the front bolt but I'd have to check my post!
I think the axle can be attached second job or at the end.
2005 Corsa Red Roadster S1
2016 Saffron Yellow (Narrow) Plus 4