the legal situation is very messy and outdated and open to manipulation and all i would suggest is that people ensure that their views are represented.
For me a simple guideline would be
human powered ok all CROW land / footpaths
motor powered: no place in national parks / allow other specific venues subjetc normal planning procedures
all mx/legal/enduro/pit bikes sound the same to me and despite trying to be informed i can't tell the difference except by appearance, not outcome, and certainly can't tell if the rider that just blasted past is planning on rebuilding a green lane or not
the "we are next" will only apply if "we" align with the wrong people