As Caudrilla themselves admit in that BBC article, every delay costs them cash money. You don't actually need to win these court cases, you just need to keep them coming. Just like physically blockading a site, the aim is to push these fuckers incrementally closer to ruin. That won't be easy, because there's a lot of deep money and deep influence at work, but even deep money has to use the same sluggish courts and winding country lanes as everyone else. The tactics and scale of operations they've used in the US just won't work here in the UK, and it's only on a vast scale and with zero hindrance that fracking can ever make money.