Yes, it's an EE type 3, in green would have been a D6xxx number and later on Class 37xxx.
![Thinking :think:](./images/smilies/icon_b_think.gif)
Ahem, anyhow, Is there a story to the D tipper? At a glance I'd say from the first photo it ran down the slope on the left backwards and through the wall. Can't really see how the crawler got in there, no obvious marks in the field.