SOURCE = https://www.gov.uk/rules-for-cyclists-59-to-82/overview-59-to-71
60
At night your cycle MUST have white front and red rear lights lit. It MUST also be fitted with a red rear reflector (and amber pedal reflectors, if manufactured after 1/10/85). White front reflectors and spoke reflectors will also help you to be seen. Flashing lights are permitted but it is recommended that cyclists who are riding in areas without street lighting use a steady front lamp.
Law RVLR regs 13, 18 & 24
So the spoke reflector aren't required. I very rarely see bikes with spoke reflectors, seems to be the first thing people remove. Also most decent after market pedals don't have reflectors so not sure why they are required by law, unless it just means the manufacturers must fit them?
No need to remove them, i was just saying they look better without. Better to be safe if you do a lot of road riding i guess. Personally I only ride off road so have removed all reflectors to save weight lol.