Think the clue should be in the name - Vanner
They have been bred specifically over the years - a workhorse, small version of the Shire to pull their Caravans, the more colour , mane, tail and feather the better - a pleasant site on the eye compared to the pickup truck with a big shiney gawdy van on the back of it - but suppose they wouldn't be very practical nowadays.
I have a traditional cob mare, but shes lightweight, plenty of mane and tail , plenty of feather but not enough feather if you compare to some of the heavy boned true hairies- big enough to pull a van at 13.3hh, plenty of colour but in the true sense of what I would expect a Gypsy vanner to be then don't think she would fully fit the spec, maybe has some vanner line in her somewhere but as no breeding records then she is prob the same as many others - just an honest well mannered coloured hairy cob with plenty of get up and go.