If it was me Id reduce 1/3 of the stems and when they start to grow lay them as close to horizontal as you can. they flower better from this angle, cant remember why.
then next yr cut a further 1/3 of the old wood down and tie in new growth. the previous yrs wood will produce new young shoots, lay them level too. etc etc.

hope this makes sense.

Think of an espalier apple tree with its branches like outstretched arms, or even curved down then the flowers coming in short branches all along
Don,t allow it to develop a tall upward stem once it has reached the height you want.
I think its called 'apical dominance' Sbgirl, when the leader inhibits the growth of side branches, its why we pinch the tops out of things to make them bushy......something to do with hormones I think....can't remember.....!

yes pam it is. its to do with the distribution of the homone IAA [Indol acetic acid] It woke me up in the middle of the night!

Oh bless.....xxx

Haha, thankyou both. I will endeavor to sort it out using your recommended pruning options though before i do i might take a picture and post it here to give an idea of what i have to contend with. After seeing the thing you might say its not even worth the effort(such a sorry looking state it is.) Anyway thanks again and a good weekend to you both.

Thanks Funguy a photo would be good, wet & windy today.....its got to improve soon surely!