Working hours and driving

Dano:
I am new to driving and need a bit of clarification.
I work 2 jobs,the first is a Monday to Friday 8:00am-4:30pm wit 2 15 minute breaks(paid) and a half hour lunch(not paid) . The second job is 6:30am-6-30pm with 3 30 minute breaks which are all paid for.I don’t work Sundays. None of these hours are usually done driving but on occasions(so far once this year) I have had to drive our 7.5 tonne lorry during my Mon-Fri job. I only clocked up about 4 hours of driving on that day and the rest was breaks/other work. I keep a diary of all my hours but wanted to check if I was working to much/doing things right.
Thanks for any input you can give me

WTD for non driving job and drivers WTD are different and do not get added together = no WTD issues

Where you do seem to have a legal issue is not getting your 45 unbroken rest in every other week
The non driving job cannot count as rest for the EU tacho regs

Working mon to fri in a non driving job means you can do the sat job every other week only