Well the P fairy visited me yesterday (probably a pinch after hitting a pot-hole at a reasonable speed).
700C, 25mm Continentals on Mavic rims.
Tyre off one side only using levers to start with.
Tube out, found and repaired the hole as i was doing it a home.
Tube in and pushed up into the tyre.
Very slightly inflate the tyre.
Starting at the valve, push the valve in a little and slip the rim in. (been doing it this way for 40years on a variety of bikes)
Then grasp the tube either side of the start with hands around the whole tyre and rim and roll the tyre bead into the rim.
Work both ways from the starting point.
As you go push the tyre into the well of the rim and check the tube is not caught.
I usually find I can get all but the last 6-9 inches of tyre in easily, the last bit is a bit more difficult but the rolling technique works.
Inflate tyre.
Check it stays inflated.
Find it doesnt
Back to the beginnign and repair the second hole.
All done leisurely in 30 minutes whilst watching the end of the Grand Prix !!