The Franke Siphon 2 (Lira 2) Plumbing Kit is a reliable, high quality kit for your kitchen or utility room for years to come. For 1.5 and double bowl sinks.
Wirquin Kitchen sink waste kit, (Dia)38mm | DIY at B&Q
1.5 Bowl Sink Waste Kit Pack B | Homebase
Cooke & Lewis 1.5/2 bowl Pack B waste, overflow & plumbing kit | DIY at B&Q