I found out last night that the BCF (British Cycling fed) Banned the use of Powercranks in road races (back in February). They feel that they make effect the bikes handling and see them as a danger.
Evidently a few riders at the local evening crits have found them off putting / eye catching, so it looks like I am going to be spending a lot of time changing cranks every week. No problem though it is a bit of a same as the crits make up one of my most important training rides. Still it will interesting to see how I get on riding standard cranks.