Light at the end...

...of the (Islington) tunnel - 878 yards long on the Regents Canal.  Mr HCB and I went to a lovely walk this afternoon exploring parts of the Regents Canal that we haven't been to before.  We found a lovely secluded coffee shop on a disused canal basin that is now a nature reserve, with a pair of swans and 4 cygnets, plus innumerable ducks, moorhens and coots (extra).