All thanks as ever for taking the trouble to reply, very helpful.
I had looked at the Park options- possibly default for many I think.
The PRS3 needs to be bolted down to the base or to the workshop floor so may not be ideal for the van.
The Feedback range, particularly the pro sport elite, looks promising.<£200 on Rutland cycles site.
Kestrel has a built by the artisans in a shed look to it which suggests it will last but at £450 it is top dollar?
Richard