twinstacks:
KACHING !! The penny drops.Thanks very much I have now finally got the grasp of it sorry am such a slow trucker lol.
Another satisfied customer, excellent. 
I did previously have on here a simple version of both the tacho and WTD rules in about 6 sentences each, which covered everything and removed all the flowery bits, but sadly I had to delete them as someone kept reposting them in other threads, almost as if they were the actual rules.
The regulations are not that complicated they just need to be read carefully, and by read I mean all of them including the boring bits such as the definitions of each term used and so on.