Braun BN0087GYSLMHG that is always reading 1 hour ahead of britsh time

Best thing you can do is download the instruction sheet from braun-clocks.com. Go to bottom left of page and click on Manuals search, then enter your watch model number in the box.
You need to calibrate the hands, particularly if you've changed the battery. Read the instruction carefully, it's a bit involved but it will solve your problem.

It sounds like your watch is set to the wrong time zone. If you haven't got instructions, you can get them from their web site.

You can get instructions from the Casio web site.

Go to the casio web site "casio.com".

Select "support" and the "manuals",
watches;

Accept terms

Select "watch manual archive"

Read the number of the back of your watch and enter it into the search box

You've gotta go to the set setting, one click out on the knob and cycle through all the timezones using the B button (the lower one) to change all the settings to OF (for winter) or ON (for summer time). According to their website FAQ, they can't determine when daylight savings time goes into effect for all the different time zones so there is no automatic changeover from SMT to normal and back again. Disappointing, I know. I just spent half an hour going through their website looking for some master switchover as well.

Daylight savings time is primarily an USA thing. We set our clocks ahead every Spring in March and hour and back an hour in the fall. The idea was invented by Ben Franklin centuries ago to save energy and it is still done with the same idea in mind. Read elsewhere to see how it saves energy, debatable. Not all part of the country observe DST. Just turn it off and you should be fine. You may need to correct the time.

go to support page on casio. and get your manual. youll probably gonna look for a 3 or 4 digit number located at the back of your watch. once you got the manual. go to page 4. and follow the steps of "Hand Home Position Correction". that should fix it.

i also have ga 110c and i have encountered this issue

We are sorry to read of the trouble you have experienced with your Dakota watch. The problem you have described is typically a mechanical issue that requires a movement overhaul completed by our repair department. Depending on the details of your purchase (date, place of purchase, receipt, etc) this service may be covered under warranty. To determine how to submit your watch for repair, please visit your nearest Dakota Watch Company store location, or contact our Customer Service by email at [email protected], or by phone at 1-888-459-0404. Thank you!

Hold in the adjust button until the seconds start to flash. Then push the mode button until the hour is flashing. When the hour is flashing push the forward button to advance it one hour. After you do this hit the adjust button to exit the set mode.

Try this method. Set the date until it reads a couple of days in the past and then set the correct time. Of course do not touch your date or time settings between the hours of 9PM-1AM. Wait until the next day, then move the hour hand forward until you reach the current date with the correct time.

The watch thinks at Noon it is really midnite, so you must scroll 12 hours ahead to repair this. There are usually 2 "clicks" on the stem of the watch when you pull it out, 1 will set time, 1 will set the day/date, be careful to pay close attention to which is happening when you pull out the stem, and setting should go well after that.

It is possible to set the main analogue hour and minute hand 30 minutes out of phase with the digital readout, but doing so will also put the analogue UTC dial 30 minutes off. It can be done by using a variation of the proceedure for zeroing the watch hands as follows: 1. Rotate the crown in its normal opering position to set the watch in chronograph mode (mode dial pointing to "chr") 2. Pull out the crown to the second click. This should cause all the hands on the watch to return to zero. "HR" should appear on the left-hand digital display. This will allow you to move the hour hand by twisting the crown. Advance it to about half way between the 12 o'clock and 1 o'clock positions. 3. Press the top button. "MIN" should appear in the left-hand digital display. This allows you to adjust the minute hand. Twist the crown to advance it to the 6 o'clock, or 30 minute, position. Note that this will also move the minute hand on the small UTC dial to the 30 minute position. 4. Press the crown back into its normal position. 5. Reset the digital time and date according to a time zone that is in a one-hour offset from UTC. This is not a perfect solution. Your digital readings will show the correct time for all one-hour offset time zones while your analogue nads are 30 minutes out of phase. Your small UTC dial will also be 30 minutes out of phase with the digital UTC. Hope this helps.