I popped up to site earlier.  Slab is 4” and the overhead HV are very high.  You would have to be a complete tool to manage to reach up, and I’m not sure it would reach that high.

 

photos below.  Image 3 might just show the HV crossing across.

Thinking about we’ve had machines with restrictors to maintain certainty that the proximity limits in GS6 aren’t breached. 

Way easier to hire a digger+driver combo. When you look at hire prices you are basically paying a £100 a day for the driver. Look on Facebook marketplace etc.

As the driver will know their machine inside and out they will get that dug out and footings dug in a week or less