Well I tried it, and well it was not as dramatic an operation as I had feared!!
I chose the moment when he was waking up from his nap, awake enough not to startle him but still in the sleepy laid back state, and the comfort of directly on the bed. I used the same nail clipper we use. Clipping didn't frighten or shock him, the only problem was that he saw the clipper as a toy and wanted to play with it. This often happens when I am brushing him so I just put my arms around him gently and stroked him to soothe him, tactics not 100% effective but today it worked, and all claws from the front paws were neatly clipped without too much fuss.
The first couple of times I was too tentative and couldn't make the clear cut, then I got more savvy, I realised you just have to gather up confidence and make a decisive quick snap as soon as it was placed on the right spot.
Well for the first time fronts were enough for me as I suspect those are the main culprits, and the back are more difficult to get at. We will see how it goes and if the trim on the back seems necessary I may do that with the help of Cris.
But really, it was not that hard... it maybe worth a try at home!