Well !
I finally managed to get jubilee clips on the hose and tightened up.
Remembered I had a set of these:
http://www.halfords.com/workshop-tools/tools/sockets-accessories/halfords-advanced-ratchet-spanner-adaptor-set
Basically allows you to use a ratchet spanner and attach sockets, much smaller profile than a normal ratchet handle.
Used the 1/4 inch drive version, which fits a 10mm ratchet spanner.
Had to grind down a cheap 7mm socket to make it 'shorter' and managed to get it onto the nut on the jubilee clip.
I then wedged a pry bar behind the spanner, so that it could not slip off and finally managed to tighten the damn thing up !
Refilled the coolant, fitted new radiator cap and fired up the car, monitored the coolant temperature on my tablet using the 'Torque' App.
Turned the heater up and down to help get rid of any air pockets.
So far, so good !
Until....................
I got out and had a look under the car, only to see more pink coolant dripping off the undertray !
Looked under the bonnet and could hear a hissing sound near the bulkhead.
On closer inspection, there was a fine spray coming from somewhere behind the supercharger.
It looks as though this was the initial cause of the coolant loss plus the collapsing hoses, my contribution was the split hose which was loosing a lot more !
Let it cool down, topped it up again (minimal loss) and nursed it to Bolton for Andy to get on with fixing it (nervously monitoring the temperature on the tablet all the way and took it very easy)
Got to the dealership in one piece and let him take a look after he finished work.
He had a look using a torch and mirror and showed me a 'pinhole' in one of the hoses.
I ordered the hoses that could be the cause of the problem (throttle body coolant hoses ?) so that he can replace them all at the same time.
Fingers crossed that he manages to fix it, he goes away on holiday for two weeks come Friday evening !