Here are various links and a document for parents and members to look at. These describe types of meets and competition levels.
East District: https://www.sasaeastdistrict.org.uk/
Swim Scotland: https://www.swimscotland.co.uk/
British Swimming: https://www.britishswimming.org/
Swimming Results: https://www.swimmingresults.org/12months/
Lists PBs and rankings.