This case was raised in what used to be called The Small Claims Court but is now the Simple Procedure. The rules etc are laid out on the web site at: https://www.scotcourts.gov.uk/rules-and-practice/rules-of-court/sheriff-court---civil-procedure-rules/simple-procedure-rules. These are in effect what used to be contained in The White Book - the bible of court procedure. The rules in Sections 1.6 and 1.6 of Part 1 apply.
In the view of the author of this report, the rules are excellent, and as good as one could wish for IF they were observed, BUT where breaches occur unless these are disciplined, then one is back to what might call "lawyering" viz lawyers doing all those things which they ought not to such as making unevidenced assertions, not once but many times.