Self-employed / freelance cycling allowance

** Which journeys are ‘work journeys’?**

  Work journeys are those which you **have to make** in the course of        doing your job. They include, for example, delivering goods or making calls        to customers.
  Any private journeys unrelated to work are not included. Nor are journeys        to and from your usual place of work (commuting journeys), even if you call        at a client’s on the way (unless the journey is significantly different        from your usual commuting journey).

so... make your place of work your home (office). Simple.

link: http://www.hmrc.gov.uk/mileage/employee-factsheet.htm