tacho in 7:30
30mins other work
1.5 hours driving
15mins other work
1.5 hours driving back to base
tacho out/finish 11:30 am
legally no breaks required as not done 6 hours work or 4.5 hours driving 
Cruise Control:
tacho in 7:3030mins other work
1.5 hours driving
15mins other work
1.5 hours driving back to base
tacho out/finish 11:30 am
legally no breaks required as not done 6 hours work or 4.5 hours driving
What, and you get paid for that? 
3hrs driving
1hr other work
No problem
I have a shorter answer than the above - well. it would have been if I had not written this first bit 
YES