Lambley Fishings. Salmon Fishing on the South Tyne: The Birches The Birches ================================================================================ Editor on 23/01/2011 18:31:00 A small sweeping pool which holds fish while they take a breather after negotiating the rapids below. Briches has steady flow and is easily fished, and is a good after a rise of water which would have encouraged fish to move up from the pool below.