Cheers Billy, It's been a steep learning curve! I'm now a master with a magnet and bit of tubing!
The cables don't have their own channels so my front mech cable (left shifter) is going in the left side of downtube then I've got it crossing the rear mech cable before it passes through cable guide beneath the bottom bracket, I think I might have this bit wrong from looking at Chungs Pics!
The cable guide beneath bottom bracket, should my front mech cable run through guide nearest the crankset?