Artificial surfaces, of the variety like Livi, Hamilton, Killie, Alloa etc as we were discussing, are not permitted in the Premier League and Football League down south.
Richer clubs though do utilise a 'hybrid' system where they basically sew artificial fibres into the root of the soil (retaining 97% of the surface as natural grass), the advantage here being that it's a lot more durable. It's a pricey process, you are talking seven figures, so there aren't many clubs in Scotland who use it (Celtic, Rangers and Hearts from memory) but it's likely used at every club in the top flight down south.
The issue with it though is that there are actually quite a few different techniques that are used to manufacture it, depending on the process chosen and how the specific pitch is worked on, it actually leads to quite a big variation in the bounce. As a result of the difference, in preparation for matchday, some of the clubs actually have pitches installed in an attempt to replicate their opponents - I don't know the technical detail (I think they maybe have a few 'base' type structures that they use as a template and then mess with the composition) as to how they do that but we are talking a huge amount of money being spent, just on training alone.