Thanks for your quick reply, B.Diddy. I'm impressed.
Firstly, I have lost the Settings icon from my main screen (and my 2nd screen has disppeared with about 5 apps' icons loaded).
Secondly, Email Launcher is what it identifies itself as on my device. It's called Email Home on Google Play (my apologies, I wasn't aware of the different naming until I just checked), and it doesn't offer an Uninstall option on G.P.
I'm sort of going around in circles, here!
Paul.
Sorry, I'm rather green at these things. I've just accessed the app in G.P, rather than seeing it in a list with "Installed" and "Open" options, and the Uninstall option became available. I've done this and have my original screens back. I'll now work on my Contacts, etc.
Thanks for your invaluable help. P.