The Ad Library shows you ads across Facebook's apps and services. You can use it to get information about the ads you see. The Ad Library contains all active ads running across Facebook Products.
Transparency is a priority for us to help prevent interference in elections, so the Ad Library also shows you additional information about ads about issue, electoral and political ads, including who funded the ad, range of how much they spent, and the reach of the ad across multiple demographics. We store these ads for seven years.
You can view and use the Ad Library at https://www.facebook.com/ads/library.
If you're an advertiser, you can learn more about issue, electoral or political ads in the Business Help Center.I imagine that this will produce some interesting information in the run up to the election.
Look at this link. The UK Government spent over a million quid advertising on Facebook over the last year and more than half of that in the last month.