Just got back from having it done - no bother at all.
Small injection into the tube on one side, slight sting - less than a dentist injection, small cut, a little bit of pulling at the tube to get it out - felt uncomfortable rather than painful, cut a section out of it - didn't hurt at all, burnt the ends with an electrical thingy, tied the ends - again just uncomfortable then stitched up the tiny hole in the sack then onto the left one.
All done and dusted in 10 mins.
Sat at home waiting for a Chinese to be delivered and watching a film - wife doesn't know it didn't hurt - gonna milk it for as long as poss!
Just waiting for the anaesthetic to wear off!