possibly not a mainstream purchase, but I just picked up a Blackburn 70 Lumens light for £4.50 from Tredz when I was getting some maintenance bits - they had a few other super cheap lights from other makers too (eg Voyager is less than £3!) I know they can be a bit slow on delivery but been pretty happy with these folks before (fingers crossed)
https://www.tredz.co.uk/.Blackburn-Local-75-LED-Front-Light_73698.htm
Also noticed Merlin are selling Altura waterpoof panniers for £22, almost an Ortlieb for a lot less money
https://www.merlincycles.com/altura-cyclone-20-waterproof-pannier-bag-111195.html?source=PHG
https://www.tredz.co.uk/.Blackburn-Local-75-LED-Front-Light_73698.htm
Also noticed Merlin are selling Altura waterpoof panniers for £22, almost an Ortlieb for a lot less money
https://www.merlincycles.com/altura-cyclone-20-waterproof-pannier-bag-111195.html?source=PHG