n Scotland we fly F5j to Open Height Limited Rules and 2 Meter HLR competitions.
All aircraft have to comply with the FAI regulations regarding weight, wing loading and wing span.
Basic spans are F5j & Open are a maximum of 4 Meters and 2 Meter is fairly self-explanatory.
There is only one class of pilot.
The competition circuit dates can be found here: events.html
The description for F5J is here: https://www.barcs.co.uk/f5j/about-f5j/
The Scottish competitions are generally held at the Linlithgow club site.