My working day consists of 6 hours of client work and 2 hours of admin (bookkeeping, marketing, posting on Twitter, etc). Any estimates I give are usually based around one day (i.e. 6-hour) blocks, taking into account the complexity and uncertainty of the work.

Day rate
£50.00 p/hour
Day retainer**
£45.00 p/hour

*Minimum 1 hour
**Paid in advance monthly