Looking hard at this jacket from Sprayway. Can find it for about $100. There are a ton of hillwalking/lentil-warming/windbreaker-wearing options in the UK, but had not seen these before.
* wire peaked hood (can be zipped off)Blurb says the Hydrolite is "waterproof, lightweight, stretchy packable jacket suitable for a variety of outdoor activities and travel." The Hydro/dry FLEX fabric has a waterproof rating of at least 5,000mm hydrostatic head [that is 6x greater than MOD definiton of "waterproof"; nice -ed.]
* external double storm guard
* zipped mesh venting/storage pockets
* articulated sleeve for forward movement
* reflective trim detail
* weighs 510g
Check out the kid's onesy Newt Suit too, mental. Paging my bruv on that one...