That’s the same thing - I would argue that the common idea of “daylight saving time” is the act of switching clocks, not the time zone itself. It’s just that the country settled on UTC+1 with no DST.

I’d’ve said so too, but speaking to the members of my family who went through it back then - the consensus from them was that it meant sunrise further north wasn’t until almost 10am. So then you had people travelling to work and school in the morning noticeably darker. I can see why that would be less popular than dealing with it in the evenings.

From the article:

1) 193 weeks (18 Feb 1968 - 31 Oct 1971)

In 1968 Harold Wilson's government decreed that Britain would shift to permament GMT+1 by not switching the clocks back an hour in October. Technically this was British Standard Time, not British Summer Time, as there was no intention to return to seasonal time adjustments. This change increased evening daylight throughout the winter months (which was popular) but also delayed sunrise (which was not, especially in Scotland). Statistics showed that road accidents decreased in the evening more than they increased in the morning, which was good, but this couldn't be pinned down solely to the time change. Ultimately permanent BST proved unpopular enough that Parliament voted to end it by 366 votes to 81, a fairly convincing rebuttal, and the annual switcheroo has continued ever since.