Stock netting - C8/80/15 - that's 8 strands, 80cm high with vertical gaps of 15cm - mild steel £33ish for 50m, High tensile - £80ish for 100m.
Coiled wire - usually sold by weight, but the coils are about 400m and are around £33 for either mild steel or HT.
Strainers - 6" rounds about 11.50, 7" rounds about 14.30. Fence posts - about £2. All prices ex VAT.
Might be possible to get the strainers & posts a bit cheaper direct from a nearby sawmill.
Sue