This is why fixed speed bikes are still a rarity in the city: its hilly, and after a while you seem to end up with small children attached to bits of your bicycle.
This particular cyclist is doing the school run from Montpelier to Cotham by way of Nugent Hill, and claims to be breaking the proposed 20 mph speed limit in the process.
We will reassure this cyclist that the proposed zones will not affect his journey time. Nugent Hill is not in any proposed 20 mph speed zone. Furthermore, looking at the photograph's metadata in the appropriate image editor shows that this photograph was taken on a Panasonic camera with a 100 ISO "film", F3.3 and a 1/50 shutter speed, yet the image of the bicycle is not blurred. We estimate the uphill speed to be below 12 mph, possibly below 8 mph, and therefore well within range. Please work on you and your children's hill climbing ability before claiming that you will break the speed limits on the way to school.