Many thanks Timmy. That does seem to be the way forward. Sadly I (or a few friends!) cannot budge the connection, it is so tight, probably not been moved in over 30 years. I might try the WD40 route and find a suitable wrench as my spanner simple slips off the connection. Once again my thanks...
First of all I have to confess I am not a plumber so please bear with me! I have a Daryl enclosed shower in an ensuite bathroom. It was already installed when I moved into my house in 2006 and was probably around 10 years old even then. The other shower components work fine, but the top shower...