At around 1300GMT Rudiger tripped over a wire and sent one of the market makers into a spin. As a result share prices were changed in excess of what they should have been in response to trading activity. We have re-run the market maker as it would have reacted due to trading activity on those accounts that were affected. If you made trades after 1300GMT we have refunded the difference.
Sorry if we threw your Friday out of whack!