The Mid-Notts branch lived in and around the villages of Kneesall and Laxton, Nottinghamshire, from the 17th Century onwards.
The co-ordinator of this interest group, Bob Parsons, has some very high quality data concerning the branch, from hard-to-access sources. The GEDCOM file barely scratches the surface; if you're at all interested in this branch, you should email Bob for the full details.
To become a member yourself, contact the co-ordinator. Don't worry, it's free!