Originally Posted by
Reverserbucket
Not quite Dave, more to do with monitoring and threat management - the central bus station, LU/HEX, MSCP's, drop off points etc provide for congregation in places with provision for maximum surveillance. Can't really say more than that other than we live in a very different world to the one when the Spur tunnels were built.
Happily, security considerations notwithstanding, I have today been advised by Heathrow that cycle access to the CTA is expected to be restored in late summer/autumn 2018, with the side bore of the outbound tunnel becoming a two-way cycle path.