Here we go again, that time of year to worry about getting clocks changed to 'winter time'. Despite all advice on here I was unable to sort problem myself previously. Today I was getting a main service done for car which is shortly to be two years on the road. This time the mechanic insisted on giving me a demo on doing it for myself.
The key problem was noone had told me to SWIPE the screen from left to right.
So from the home screen, SWIPE
This brings up a 'settings' option.
Select settings and then 'system',
Scroll down the system options in dropdown screen and select 'reset'
Ignore other options pertaining to clock and select 'daytime saving'
Now confirm with the OK on bottom of screen and job done