Report explaining pricing and supply chain dynamics behind UK independent opticians

Industry: Healthcare
Data to include: Typical wholesale and retail prices and what determines these.
Extra notes: Summary report (not massive) to explain the supply chain behind independent options in the UK. From that to explain pricing/supply outcomes from wholesale to those presented to the consumer. A comparison to the optician chains would useful too. I can into specifics when I engage the person tasked to do this. Ideally, looking for someone who has first hand knowledge around the UK independent optician industry from the point view knowing whether the UK market is unique or it is the same for everywhere. Specific input on healthcare plans and how they influence where consumers go for their eyewear would also be useful to understand.