We recently found out that despite having a population of 346,000 people you are unable to target Cardiff business people directly using Linkedin ads! When I asked Linkedin why this was they said:
Unfortunately, at this time not all the cities in UK are available as targeting locations. This is normally because the number of LinkedIn members in those cities won't let advertisers use any targeting option and get the most out of LinkedIn Ads
So what options do you have if you still want to use Linkedin Ads?
You may want to try creating several Ad variation within one campaign targeting UK and calling for example Swansea out in the ad text