So the story continues ....

At 1 o'clock the crane arrived and was positioned in the front garden.

Six men were needed to carry the roof light to its lifting cradle 

Then six men watched 1 man working .....

and finally the roof light started to rise ......

up and over to the other side of the house ....

Then the tricky bit with telephone contact to control the lowering  ....

until it was almost in position

Phew! It worked!!

The rain came down later in the day, by which time the glass roof was secure.

Quite an exciting day!

Neighbours having an extension!

First: - Order your roof light.
Second:- Puzzle over how to get it on your new roof.  (the bit with grey bricks)

After much head-scratching (and I might add hair-pulling!) over design of support cradle and the logistics of lifting and careful despositing of roof light ..... pondering was over and a decision made. 
Hire a crane to lift  the roof light high over the top of the house and lower it 'blind' into place.  There's not a lot of space on the roof top for juggling!