OK here's some links, pictures and reminiscing from the early 80s with the Bugtussle Fusiliers.
64 pattern had no mag pouches, no one wore anything except a mess tin carrier stuffed with rain gear and a canteen carrier. In the field you'd add a bayonet and frog, and in some cases sneak some Bren gun pouches on as they were a good fit & nicer to use than the C2 bra or a US Alice clip butt pack. The fatal flaw was as you'd add extra pouches to this gear the Velcro would blow.
You carried seven 20 rounds mags normally for a C1. Six in your pockets and one on the weapon. The stuff was made for Mechanized Infantry who would be fighting the Warsaw Pact armies in Germany. Everything you didn't need was kept in the carrier. Bit of a hassle for patrolling on foot.
The 82 stuff was much better but did take some time to trickle down to all and sundry. The pouches wouldn't move, it was wider and more comfortable with padded suspenders that aren't in any of the pictures I found. You did get mag pouches for the C1 at this point and the pics are from Marstar where they have them for sale.
The thumbnails are 64, 82, C1 pouch for 82, C7 pouch for 82.
http://mpmuseum.org/index3.html