Paul Scott wrote:

I can think of a few sites on the motorway network where services
have been planned since the very start of construction, a good
example is on the M27 at Fareham West, where the the westbound off
slip is nearly a mile long with further slip roads easily visible,
and the eastbound on slip is paralled by about half a mile of road
for access to the future services. Been there 30 years now so why do
the Nimbys always seem so surprised?

Is this why there is a long sliproad at the M25/A217 junction ?