The Hot Toys 1/6 British Mk6 helmet is still a very tight fit although the details are nice. The Barrack Sergeant 1/6 Osprey MKII Body Armour comes with various pouches that you can attach to the assault vest in British Army's Desert DPM camouflage.
He is armed with a L86 Light Support Weapon. Dragon used to equip their British soldiers with lots of these e.g. Operation Enduring Freedom "Roger" (post here)