The basic van is a 1991 long wheelbase hi-top, 1721cc, which was converted by Monsal in 1994.
Monsal do not now appear to be in business, and there are certainly no details via Google.
Being built on the hightop Trafic means that the rear doors are full height, although these doors are not accessible from the inside, they do give a larger kitchen window.
The gas bottle, water tank and spare wheel are accessed from the rear doors, and there is plenty of other stowage for odds and ends there.
The van is completely self contained with porta-potti and shower enclosure and rear kitchen. The shower/toilet door forms a screen from the rest of the van when in use. The basin is a bit perfunctory and we don't use it as the kitchen sink is more convenient.
The cubicle makes a very useful storage space for awning, camp chairs etc when on the move. There is a three-burner gas hob with grill and a three-way fridge.
Opposite the fridge is a small worktop with plenty of stowage space in cupboards above and below, with additional storage under the two rear seats..
There are four seats with seat belts and the driver and front passenger seats are swivelling 'Captains chairs'. These convert into two single beds or, with the addition of a simple central platform which I have constructed, becomes a full width (5'6") and very comfortable double.