Now, a general view of the revised interior on the heavy rescue version:

The upper, middle compartment which previously took a hose reel, has been opened out:

and additional runners for an extra equipment tray have been put into the front, upper compartment:

Finally, the interior with the equipment trays in place:

Final equipment hasn't been decided on (indeed, a revised, longer body has been suggested), but some of the equipment being trialled can be seen in the Knaresborough photos shortly. I'll post a link later in this topic to these.