1. The Thames Barrier
The Thames Barrier should be seen as the Sydney Opera House of London, its gleaming piscine sections catching the sun as it rises to the east of the city. Two things have prevented it achieving proper iconic status: 1) it’s in Woolwich. No disrespect to SE18, but it’s a bit out on a limb; and 2) it has a grim purpose, protecting the capital from tidal surges and rising sea levels. When it was opened in 1982, it was expected to only be used a couple of times a year. In fact, on average it’s closed six or seven times annually, although in 2014-15 it had to be closed 50 times. Ulp! Thanks, Thames Barrier! Chris Waywell