In the UK just about all of those urban “remain” types who care about climate change vote Labour.
They certainly do not, except as a tactical choice on occasion. In fact both the question and the answer is exactly the same as 'why do people in Richmond never vote Labour when they're cross with the Conservatives?'
Yes, but Labour wins some pretty upscale seats like Islington etc...The thing that surprises me is that the Coalition is even still competitive in upscale inner city electorates like Wentworth. Seats like that in Canada are now totally unwinnable for the Tories and in the US professional urban voters have completely turned their backs on the GOP. And its not as if the Liberals in Australia have done anything to make themselves more palatable to urban quasi progressives - they are led by a fundamentalist Christian, they are totally xenophobic and into complete climate change denial.
The corrrect British analogy for Wentworth is surely a seat like Kensington or maybe even Chelsea and Fulham, except Wentworth is a bit more suburban than either. I agree that such a seat would be unwinnable for the Republicans in the United States, and maybe for the Tories in Canada,* but it's clearly still very winnable for the Tories in the UK at least, and Labour is as irrelevant in Chelsea and Fulham as Labor is in Wentworth.
*I think the way Toronto is cut up doesn't create any great analogies, but neighborhoods like Rosedale, Forest Hill and/or Bridle Path if united into a single riding would be a good analogy - and that seat probably would be winnable for the Tories.