Speed limits for Symphony?

From this:

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It's critical what the maximum unladen weight is (MUW).  I can only find a Peugeot plate, under the bonnet, and the lowest kg figure is 2800.  That doesn't really tell me anything, it might have been the MUW of the original van, pre-roof-cut, and pre all habitation fixtures and fittings.  Can anyone tell me where to find the Autosleeper plate (if there is such a thing) or definitively, what the MUW is?

Give A/S the build number and they will tell you.

inspiredron wrote:Give A/S the build number and they will tell you.

Thanks.  Where is the build number?

It's on a sticker in the glove box. Mine is on the inside of the flap when you open it.

PB

The Autosleeper web site quotes the current Symbol as 2,896kg, mass in running order. Maximum laden mass is shown as 3,300kg.
The speed limit cutoff is 3.05 tnnes unladen. 
So its 60 on single carriageway and 70 on dual carriageway, same as a car. I think my 61 plate is about the same.