Using the M1 as a rough divider, any thing to the right/east of the M1 so Nottingham, northampton, milton keynes, lincoln, peterborough, kettering ect are classed as EAST MIDLANDS
this is my rough suggestion to the areas
http://i208.photobucket.com/albums/b...stwestmids.jpg
there is obviously flexability with the boundaries, they are only a suggestion.