British fish pie

This fish pie features salmon, haddock, and cod.  I first had this dish at the Borough Market in London in 2012, and it took me a few years to find a comparable recipe (although admittedly, that restaurant’s version is better).  Recipe is based on this:  http://step-by-step-cook.co.uk/mains/fishpie/?units=US&persons=4, with the following modifications:  added a bay leaf and thyme to the poaching liquid for the fish.  (Mar. 2015)