Error in displaying time in history seemingly caused by change to daylight saving time.

[DanC180]

Although the CVS data takes account of the change in timezone caused by shifting into daylight saving time, the display in history does not and has shifted all pomodoros an hour ahead (so one finished 9:25 UTC is now displaying as having be done at 10:25). Peculiarly, this did not occur immediately after the change from GMT to BST, but only occurred today, 11 days after the change. I have tried exporting, deleting and then importing to see if that fixed the issue but it did not.