Alan asks (but the multiquote does not seem to want to work at the moment):
My limited experience from working in the UK is that the price consumer pays for goods are inclusive of VAT and the VAT is basically invisible to the consumer. The price stated is the price paid. That seems consistent with the concept of value-added as the end-user is a consumer who does not add any value to the product they purchased... so they have no role in the VAT recovery accounting.
To keep this conversation discussion photography/film-based... when we buy and use film we consume, not add value to the film product. I'm not sure if that VAT, as well as VAT on chemistry, printing paper, etc can be recovered when the film is used in the production of an art photograph that is offered for sale, though. Seems like it might be recoverable, thinking logically (or illogically), since the production of an art product has an increased and added value using the various photographic supplies used in the production of that art. It's not clear to me where the added value chain ends.

But it does seem like a very complex accounting that requires cooperation of suppliers to understand what VAT has already been paid in order to compute the difference that is owed after those materials are transmorgrified into something else.
Here is the tutorial I went to for a better understannding:
Value-added tax (VAT) is collected on a product at every stage of the supply chain where value is added to it, from production to point of sale.
www.investopedia.com