Question Small Unidentified Diptera Specimens

These are very small Diptera specimens ( less than 4mm ) that neither Bert nor I have been able to identify , both of these were collected at my home in Sunbury. Any thoughts would be welcome.

This first one appears to be a midge or something similar (2/12/22) photos 1 - 8

The second one is clearly a fly but the enlarged front legs that look capable of grabbing are a mystery photos 9 & 10

Another specimen from the Hazelnut Bush (7/12/22) photos 11 & 12 .

Caught this in the Wombat State Forest , got no idea what kind of Fly this is , check out the spines on the back legs (18/12/22) photos 13 - 17 .