"Spoliation is the wrongful deprivation of another's right of possession. The aim of spoliation is to prevent self-help. It seeks to prevent people from taking the law into their own hands ... The cause for possession is irrelevant - that is why a thief is protected ... The fact that possession is wrongful or illegal is irrelevant, as that would go to the merits of the dispute" (extracts from a 2012 Supreme Court of Appeal decision)
As a landlord in dispute with your tenant you may well be tempted to avoid the delay and cost of litigation by taking your own eviction or enforcement action.
Bad idea. No matter how good your overall case may be (or how good you may think it is), taking the law into your own hands automatically puts you in the wrong.