The AAIB reckon the aircraft was almost 20 Kilos overweight when it departed Bute, so by how much was it too heavy on leaving Strathaven?
I read that differently. I understood that they reckon it wa 20kg overweight leaving Strathaven, and lighter leaving Bute (due to fuel burned off). So it might or might not have been overweight leaving Bute, but certainly was lighter than it was leaving Strathaven.
At least that's how I read it, but admit it could be read differently.