The Natural Philosopher wrote:

Surely that is the dreaded pebbledash..?

Depends on the region. In the midlands the pebble dash is litterly dry
pebble thrown at the wet top coat so that the pebble remains exposed.
In Scotland rough cast is termed Harl. I tend to think of rough cast as
being the wet mix thrown at the scratch coat. Mind you I have no doubt
that regionally the mix will vary as will the technique. I know that
you cannot find many people who will carry out such a messy job.

Regards
Legin