As the M6 continued north towards the Scottish border, planners were becoming increasingly concerned that the traffic levels would be so low that nobody would want to build any service stations. With breakdowns and driver tiredness being big concerns, the services were needed, they would just be hardly used. Clifton was one of those, whose traffic levels were so low it never made it off the drawing board.
Some documents suggest the services would have been southbound only, like Killington Lake. This would match the ghost slips, which are visible on the southbound side only - but the highway boundary (the fencing around the motorway) seems to have left room for a northbound onslip to be built too.
The large plot of land reserved for it is very flat and would not have required much work. Between the onslip and the offslip, there appears to be a tunnel under the motorway, although it looks like it is fenced off.
The nearest services - Tebay and Southwaite - are almost exactly 15 miles away each side. Both of those were also expected to be quiet, and over time they have been grown instead of having three services.
The services would have been twice as big as the nearby village of Clifton. A police outstation was planned to be provided here.