I live round the corner and as a regular Parkland Walk walker and cyclist with my young son have already objected. It's great that this is now on LFGSS. I don't know if anyone has mentioned this in the thread yet, but there was an article about this in the Standard a few days where the objectors (ie the owner's neighbours basically) were described as 'environmental extremists'....
Amusingly the owner is himself a member of the main extremist opposition organisation (the very radical Friends of Parkland Walk, who carry out revolutionary acts such as litter collection, undergrowth cutting back, various planting operations etc).
Per Zoopla the cottage was bought for £1.9m.......even by Highgate standards that's a high price!
I have to say the idea of permanent vehicle access is scarily plausible, but I hope unworkable as it would involve turning part of Parkland Walk into a driveway. However, sadly, in my experience of planning in Highgate anything is possible if you have deep enough pockets and resources........
Anyway, please object to the CMP - all support to preserve the treasure that is Parkland Walk is much appreciated.