The Herbs and The Adventures of Parsley   Classic BBC kid's animation by Michael Bond
On this page ..... This is the only item of clothing that's come to light so far.....for either series. And a cute little thing it is too,which hopefully saw plenty of messy painting and baking action.
Child's apron

Strictly speaking it's probably best described as a tabard.
There are 2 labels in the neck.One has a logo -an outline of a house with "Prova" inside- followed by "Drip Dry Cotton" and "Length 20"".And the other just has an item or pattern number of "4520/1/8381".
I've done the usual Google checks for "Prova".But all I've managed to find are various vintage "Prova" items for both children and adults.So I've no idea if they were clothing manufacturers or it was just a brand name.
Just as odd is the complete absence of any copyright markings.But it clearly relates to The Herbs rather than the sequel,and I'd be very surprised if it wasn't among the earliest items to be produced,simply based on what I know about all the other stuff and the look and feel of the item itself.And "earliest" means 1968.

It's also an unusual thing for a company to be interested in as a one-off,so you'd think it must've been part of a small range......until you start scratching your head wondering what else they could've included,and come to the conclusion that maybe it's no coincidence it's the only item of clothing to surface so far.
The pic above shows the front,but the back has the same repeat pattern with a tie half way down to match the one at the top.And that simple repeat is shown in close-up below.
No pockets.And no Bayleaf or Constable Knapweed,which is a bit surprising,particulary when the onion clan get such a lot of cloth space. But you can't deny they make a handy border along the bottom and useful infills in the top half.And all-in-all it's an undeniably evocative and sweet little item.