I've just been looking at the posting in challenge news about forest access following the winter storms.https://www.tgochallenge.com/2022/03/31/forest-access-after-storms-arwen-malik-and-corrie/
I can confirm that the area around Quithel (the photo at the start of the article) right above my house, has been made safe. FLS have made a big effort clearing all the main routes and if you stick to them you should be OK, there are however an awful lot of dangerous hanging trees around so be very careful if you head off the main logging routes. I plan on doing a recce of the southern leg of the Builg Mounth route at some time and I will report back. That leg is prone to windblown trees so I wouldn't be surprised to find issues.

Thanks for your efforts, Brian.