I, or we, will never know as I doubt Londonmagicstore aren't really going to get into conversation with me.
TBH, it doesn't matter really. The phone works as it should, and that's what I paid for.
When it was wrong, I emailed them and enclosed the picture of the dashes, and they asked me to send it back, and a while later they said they'd fixed it and were sending it back to me.
Arrived in the post late this morning.
Sim out of my old iPhone 5c and into the iPhone 6s, switched on, and went through the Apple ID stuff and within ten minutes it was up and running as my phone and identical to what it was as well as identical to the iPhone 5c of course.
iCloud backups are wonderful things. Even my recent calls and my text conversations are there. All it needed was the password for our WiFi to sync it all.
Mick F. Cornwall