After 4 hours of searching from shop to shop I finally found one! The problem started when I put one of my palm trees in my shower to water in and wash its leaves. I put the plant on the seat in my shower only to turn my back and hear it crash to the floor! Half of its compost/soil spilled out onto the shower floor. I swept most of it up then rinsed the rest away, but sadly that bit blocked my shower drain. I went to Scewfix, Aldi, Argos, BM Bargains, 3 local plumbers merchants but no luck! One bloke in one of the shops told me that there's a shortage of sink plungers at the moment. Was he taking the mickey, or is that true? Anyway, I eventually found one hidden away in the local Tesco. I've just plunged the shower drain and I'm glad to report the compost has gone and my shower drain is now flowing freely!