Lewknor services was a planned service area which wasn't on the drawing board for long. It would have been to the north-east of M40 J6, with two new west-facing sliproads being built in the new place instead of the old ones. A single carriageway link road would have connected the two sites and a new roundabout would have been built at J6. There would have been 900 car parking spaces.
The services were initially rejected because of, amongst other things, the traffic impact. This was adjusted and it went to appeal, and this time the services were rejected because of their environmental impact. The council said that they believed only Cherwell Valley services would be necessary.
The services then lost at a public inquiry where Oxford services was raised as a preferred option.
Plans for the services and several others can be found at South Oxfordshire District Council.
Although this was the site that was put forward, Swayfields (the company behind Extra) first considered two other sites to the north of J6.