Thanks for your help.
If I go to Settings / About Phone it says: FP1, Android 4.2.2. (Which is what it said before the upgrade).
The text entry keyboard has changed, with the comma now to the left of the space bar;
Following the upgrade I let it do yesterday, I have also lost Play Store. There was a message about it when it rebooted. I found an icon for it in Apps / Widgets, and dragged it onto my screen, but when I run it, it just makes the screen flash white briefly, and then return; it doesn’t run. How can I restore this?
A list of apps:
Facebook, Twitter, Messenger, WhatsApp;
OS Locate, OS MapFinder, Strava, Google Maps, BBC Media Player (unreliable), Adobe Reader, Booking.com, TripAdvisor, Ebay, Flashlight, smile bank, National Rail, BBC iPlayer, Play Store (not working)
I don’t think I have Google Apps. Everything I’ve downloaded was from the Play Store.
Any advice very gratefully received.