>It'll need to withstand torrential rains for a few hours for no more than £70those are hard to find in any format, let alone in camo and for less than $70
Ive been researching a good hunting jacket myself and even the most expensive premium brands will wet out under heavy rain from what ive read.
If you are just looking for something thats reasonably weather resistant and has camo you can try looking through the cheaper options here
https://www.blackovis.com/clothing/mens/rainwearAlthough theres like a dozen budget hunting gear manufacturers in the US from what ive found so you can shop around on walmart, cabelas etc.
If actual waterproofing and budget is more important than comfort and camo, this seems to be the recommended pvc option.
https://www.hhworkwear.com/en_us_ww/impertech-deluxe-jacket-70148?color=420775Then you can throw a cheap mesh based leafy shirt over the top to have the camo effect.
