Given the company's name, it seems the assumption has understandably be made that they are on-site to produce themed rockwork, however after having a look around the portfolio on their website
there are also examples of them producing 'timber themed render'. This is in line with the proposed materials submitted to the local council
earlier this year which stated that the theming features would consist of "timber themed render and steel" (and there's obviously no disputing the latter now).
Now obviously this doesn't mean we'll not also see some form of rockwork, as the descriptions about the materials being used are limited and brief, but until we see what's going behind the scrim we can't know for sure...