The Pantheon at Stourhead underwent a restoration programme last year, and at the end of the project a webcam was placed on the roof, overlooking the lake. It takes an image every 15 minutes. A timelapse film of the advance of autumn was made available by the National Trust yesterday:

and more recent time lapse videos and a live feed can be seen on the homepage of the webcam company.

This is what Stourhead looks like right now:

Stourhead, 11.42 am, Thursday 22 October 2015.

And three days later:

Stourhead, 11.00 am, Sunday 25 October 2015.

and three days later again:

Stourhead, 9.00 am, Wednesday 28 October 2015.

UPDATE Wednesday 28 October: Don’t forget to listen to BBC Radio 4’s PM programme at 5 pm this afternoon – Alan Power, the Head Gardener at Stourhead, will be giving his annual impressions on autumn at Stourhead. Here’s last year’s lyrical offering. Last year Chap and I made our autumn colours visit to Stourhead on 28 October. We haven’t been this year yet – we’d better get a wiggle on. The katsura (Cercidiphyllum japonicum) in our garden has already shed about half its leaves, and as we’re only about 10 miles from Stourhead I imagine progress there is similarly advanced.

UPDATE 2: Here’s Alan Power’s 2015 contribution to PM: piece starts at 50:25.