GMT vs BST
The UK switches between Greenwich Mean Time (GMT) and British Summer Time (BST). Right now the UK is on Greenwich Mean Time (GMT) (UTC+0).
Quick answer
GMT
UK winter time.
Offset: UTC+0.
UK winter time.
Offset: UTC+0.
BST
UK summer time.
Offset: UTC+1.
UK summer time.
Offset: UTC+1.
What is GMT?
GMT is the UK’s standard winter time. When the UK is on GMT, the UTC offset is UTC+0.
What is BST?
BST is the UK’s summer time. When the UK is on BST, the UTC offset is UTC+1.
When does the UK switch?
The UK changes between GMT and BST when the clocks change in spring and autumn. For the official rule and the upcoming date table, see UK clock change dates.