I'm more or less back to normal - or whatever it is that passes for normal in my life. I'm hoping to get down there to see your driveway on the 25/26th, but I'll cvonfirm that as soon as I know for sure. Still, the pictures are always welcome!
When it comes to casting in-situ concrete with projecting ancor bolts, the simplest way is to dig your hole for the concrete, making sure the anchor block will be big enough to support the post and light fitting. Get a piece of 6mm ply that's roughly the same size as the bas plate and mark the bolt positions on it. Drill through and use a couple of nuts either side to fasten the bolts in place on the ply, so that they correspond to the holes in the base plate of the lamp column, with ample cover into the concrete, and enough of the 'stud' sticking up to allow the base plate to be securely fastened once the concrete has cured.
Mix your concrete (a C20 or C30 equivalent), pour it into the hole, vibrate or tamp to drive out any air pockets or void, and then settle the ply-and-bolts template onto the surface, aligning it as required and checking that it's more or less level. Allow the concrete to cure for at least 5 days before stripping the ply template and fitting the column.
Does the lamp come with anchor bolts or are you going to use threaded rod?