In what type of location is it likely to find larger or smaller amounts of ozone?
Using data from the 2017 Tropospheric Ozone Assessment Report we can answer the first part of the question. There's a massive database of images and plots available, from which I pulled just a few.
Here's a full image to include the legend and caption:
Now I'll focus just on the UK since that's what you've asked about. From left to right:
- Rural, high elevation sites
- Rural, low elevation sites
- Urban sites
- Non-urban sites
Based on these maps, the higher concentrations appear to be in rural, coastal sites. There is only one high-elevation site in the UK, but it also has a higher relative concentration, consistent with high-elevation sites in other countries.
Why is the concentration different between locations?
According to Wikipedia:
Motor vehicle exhaust, industrial emissions, and chemical solvents are the major anthropogenic sources of these ozone precursors. Although the ozone precursors often originate in urban areas, winds can carry NOx hundreds of kilometers, causing ozone formation to occur in less populated regions as well.
In the UK, the prevailing winds are from the south and west (source), and population is densest roughly in the south and east:
This means we'd expect to see ozone concentrations roughly north and east of population centers, which is consistent with the maps.