The 20mph campaign/s and arguments...

Speed Limits

Do speed limits apply to bicycles? Short Answer

Mostly no, though bye-laws could impose speed limits on cyclists. Long Answer

Normal Roads

On 'normal' public highways, the general speed limits (whatever they are) do not apply to bicycles.

http://www.astounding.org.uk/ian/cyclelaw/speed_limits.html

To summarise:

Do speed limits apply to bikes?

Short answer:

No

Do speed limits apply to bikes?

Long answer:

Noooooooooooooooooooo