JayD:
Do i need to keep a manual log of my driving instructing hours?
Yes in any week that you drive in-scope of EU regulations you should keep a record of any other work done in the same week.
You only need to record the start and finish times.
Legally the records for work done on none HGV driving days should be written on charts or printouts but it seems the DVSA will accept records kept in a notebook.
Sent from my mobile.