The Egg is a Victorian storm relief sewer that serves both the River Tyburn (KSP sewer) and the Westbourne (Ranelagh sewer).

Drainers from all over the world converged in London for this year's International Drain Meet, it was a quality evening packing more people in a drain than I've ever seen before. It was a pleasure to both see old faces and meet the rest of the community, big shouts to everyone who went!

Officially known as the North Western Storm Relief(NWSR) the main pipe was built in 1924, stretching under the streets of Notting Hill and Kensington it serves several large sewers.

When first stepping foot in Crypt one could be forgiven to thinking it is an anomaly in the system. Seemingly the purpose of this chamber is to act merely as confluence between two egg shaped sewers, the largest being the Putney Extension.

This culvert is found on the upper reaches of the River Irk. Unlike the massive downstream culverts like Optimus Prime, the river here demands only a small conduit.

A metal walkway forms an L shape around a chamber, a large 20ft trunk sewer flows beneath. Two sets of well maintained machinery allow massive penstocks to be closed to send the flow down another route.

The Beck Valley culvert flows east of Nottingham city center down into the River trent.