Posted: 26/08/2017 at 16:50
Climbing roses put up new long shoots from the base ... every few years you can rejuvenate the plant by removing the old ones which have been replaced by the new.
Often new shoots have more thorns than older ones ... as they stems get older some of the thorns wear off. The leaves on the new shoots look similar to the older ones. I'd be happy that the rose is as it should be.
While those new shoots are young and flexible it would be a good idea to train them sideways ... that will stimulate the growth of sideshoots which will produce the flowers next year. There's a video here
If you let them carry on growing upwards you'll just get a load of flowers at the top where you can't see them, and few lower down.