On Apr 10, 1:07*am, "
wrote:

The slide show was also incorrect in that it said that the Dalston
Junction-Highbury & Islington extension would be opened by January 2011.
IIRC on this group, however, it is due to open in May 2011.

A pedant would also point out that the Brunels' tunnel wasn't the
first underwater tunnel, but the first under a navigable river.