Hatton Parkway is not actually part of the West Midland Lines plan, instead it is a project layout for Hornby Magazine. The idea is to move on from the 'Shake-the-Box' style layout and use flexible track, some kit-built structures and more advanced electrics. As it shares its stock and geographic area with the WML it is a sort of 'honorary member'. 
This is the trackplan, to help make sense of the photos.
The fiddle yard has two 'clockwise' roads (top), two ;anti-clockwise roads (bottom) and two bi-directional roads (middle) for multiple units. The bi-directional roads are both split in two electrically as are one of each of the clockwise and anti-clockwise roads giving a maximum capacity of 10 trains.
Park and ride DMUs (one or two 2-car sets) run from a centre road anti-clockwise, over the crossover and into the bay. Return to Birmingham from the bay, clockwise to a centre road.
Other passenger services, DMU & Voyager run both clockwise and anti-clockwise from the centre roads round the layout, stopping or not at the mainline platforms.
Freight services are run by fixed rakes which run either clockwise, from the top roads, or anti-clockwise from the bottom roads.
The layout is 9'x2' and the grid squares are 6".
