I can recommend the Bewilderwood carpark as a good place for Purple Hairstreak as well, if you happen to be exploring children's attractions in that part of the world!

Nice photo! I came across several Jersey Tiger caterpillars in my garden just north of Cambridge earlier in the year, and have also had several adults flying around between the showers over the last few days.

Wow, that sounds pretty spectacular. There were a couple of Marbled Whites along the SE edge of the main lake at Waterbeach new development, but I would guess 20-30 MBs on a lap of the lake, plus similar numbers at Worts Meadow in Landbeach.

Interesting - MB were out in big numbers yesterday on the Waterbeach barracks new development and in Landbeach. I wonder if they're a bit later at Magog Down with the N-facing slope?

Nice Yellow Rattle too!

If anyone fancies a guided tour of the site with a local butterfly expert, I gather there are still some spaces on tomorrow's walk with @epollard.bsky.social - details here: butterfly-conservation.org/events/field...

Hi Jeremy, if this is still a live issue then I think you should be able to do it in PowerShell. A starting point would be something like:
cd C:\Path to top level of folder
Get-ChildItem -Recurse | Select-Object FullName,Length | Export-Csv C:\Output location\file-sizes.csv