TimeZone

Is there not a way in which we can set the default timezone to our local zone?

All of our reports, data sources, servers and user devices are in the UK (for a UK audience), so quite frustrating that we do not seem to be able to set the timezone across the estate to the UK Locale [not to mention, as DD/MM/YYYY formats on the date] ... some people have taken to workaround by manually offsetting from UTC > BST ... but of course, when we switch from BST back to GMT, all of the reports go off by an hour again.

Tips would be appreciated.