Appreciate this is rather niche but I have just picked up 2 softshell jackets for the kids from the local H&M for £10 each in the sale. Whilst not cycling specific, they seem really well put together and better spec'd than most of my softshells. They are still showing online for £15 (in green and blue)
http://www.hm.com/gb/product/05302?article=05302-F#article=05302-H
On the subject of H&M, their Olympic-inspired sunglasses are £3, down from £25. Faintly gold lenses, but with rubber nose & earpieces. Ideal for not caring when lost/broken/scratched. No link, but worth checking if you've a nearby store- I found a fair pile of them in the Oxford Circus store.