These flashing lights

[martin84]

These flashing lights which the bicyclists appear to very much enjoy using.

Are they legal?

[Vvroom]

martin84 said:

These flashing lights which the bicyclists appear to very much enjoy using.

Are they legal?

From the Highway Code:

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