1 - my bad
2 - i'm sorry but yes it does

as a btw, i have made use of this permissive access to visit Imber on several occasions

1 - the barrier is across a road at the boundary.
2 - these particular roads are permissive, they are on MOD land but these particular routes and certain footpaths and bridleways elsewhere on Salisbury Plain have permissive use by the public subject to restrictions by the MOD which are usually but not always posted on the MOD website @ https://www.gov.uk/government/publications/salisbury-plain-training-area-spta-newsletter .

yes, on the 14.2.2023

the jct of Charlton Rd/Lodge Cswy - oops my bad sorry

the cycle route goes through the car park