Welcome to this site which is a collection of the resources that have accumulated on various forums, websites and individual pages over the years. I hope that you will be able to get more of an idea about these uniquely British campers. Quirky? They certainly are, you need 4 bits of string to put them up properly. But they are very suited to the job that they do and the basic design hasn’t needed to change since they were first produced.
There are several resources out there already and I’m going to link to them when I am able to.