travel allowances

I'm glad to see that we now have some increased openness about our MPs travel expenses.
Its interesting to see who has claimed for cycle travel. Cameron doesn't make the top 10, and surprisingly Lynne Jones doesn't either. I suspect that quite a few cycling MPs don't actually claim their mileage.
In the same way, I have not received any travel expenses (see bottom of this page for allowances paid) from the city council. Claiming for 2-3 mile journeys at 20p per mile seems to have a longer admin time/cost than the actual claimed expense. And running costs of bikes are much lower (when was the last time I replaced an inner tube?).