Are short workings ok to put down on here (i.e. a 20 to Loughton when it usually operates to Debden) ?.
Short workings are far more common btw on TfL services, than bus services in, say, East Anglia.
On TfL cross-border service 20 (Debden to Walthamstow) I saw a short working to Loughton, aswell as to Woodford Wells and to Woodford Green.
A DWL (Wright Cadet) on TfL cross-border service 397 (Debden to South Chingford). Service is usually operated by W-reg ADLs (ALX200s).
An interesting note on the W-reg ADLs. They used to operate Arriva East Herts & Essex (who used to operate TfL services 397, 549, W13, W14), until they passed to Arriva London to operate routes 397 and W14. They are very rare in London in the fact that the blinds are still the same from bought new, they have destination in capitals with via point above, instead of TfL spec simple location (i.e. DEBDEN BROADWAY instead of Debden). And they are W-reg, meaning they dont have long to go in terms of TfL life span.