The picture still lacks details and different angles.
Pending clarification edits, a very rough idea would be:
This is some kind of a DPM style garment. Even with much better pictures, it will be difficult to retroactively assign an exact diagnosis or identification.
Disruptive pattern material is a British camouflage style in origin but used elsewhere as well. It is also not exclusive to the British Army, but a popular choice in civilian military style clothing. The latter can vary in quite some details from 'the original'. Which itself has quite the variation over time.
In this case it looks most likely like a 1968 pattern, (pre-85):
- '68 pattern Combat Suit (DPM) Smock, Man's Combat (1968 Pattern)
Parachutist version had a slightly different front, and especially cuffs, sniper version more external applications, but all some kind of crotch flap.
–– The inside of the '68 Jacket is fully lined in Olive. It has a inside pocket on the left chest large enough to take an SLR Magazine and a pocket across the back below the waist. Also note the crotch flap. COMBAT UNIFORMS OF THE 1980's (A Beginners Guide) Part 1 DPM Uniforms
The pocket form indicates British style as well. Flat lower front pockets and visible buttons that are 'traditional' (sewed) and not 'Canadian' style (slotted) indicate an early design.
Colours as well as fabrics varied over time and for intended use. And weren't identical ever, as they also varied depending on manufacturer. Those colours pictured may also have faded or get a tint from washing. The amount of colours used indicate a temperate zone target deployment area.
Weird in the OP picture is the para-flap having three buttons, the whole thing not having the label.
But as to the changing over time design without updating the offical designation: