Posted: 01/11/2015 at 12:55
Right the strangulation isn't as bad as it seems. The damage has prompted the new growth but you want to encourage new growth from the existing main stem.
You can do one of two things, first you can create a new main stem from one of the new stems, or, and probably the best option remove the new growth to encourage new growth from the existing main stem. You need to remove the new stems as far below soil level as you can go, just like removing a rose sucker.
Nothing much will happen this year but you should see new growth next spring from the bushy growth at the top of the main stem.
Just remember to tie in with the wire behind the stems in future. I'm sure you won't repeat the mistake.