I don't think so Rose. The mushrooms are a bit more sort of "bread-and-butter" pieces produced by the studio.
Please, this is only a rough sort of outline of what went on - I may get some details wrong, do not take this as accurate information.
Initially he mostly made individual pieces - each signed and with its own registered unique number, although he did make some mushrooms and weights with silver things on them too.
Then, one of these caught the attention of a TV presenter of collectables programmes, it got a lot of publicity.... and suddenly the mushrooms and pwts were going like hotcakes and he went into overdrive making them.
The publicity and demand rather changed his operations and production of the unique numbered pieces went into decline and he started marking things in a more general manner.
I mean by miniature (rather than a small thing) a similar thing to the Monart miniatures - where the object is a scaled model of the larger thing - all the details are in miniature too. It's a much harder thing to produce than the large scale item, or indeed, just a small piece with it's own design.