Posted: 29/02/2016 at 10:36
If they really are Hybrid Teas (usually have one flower on each stem), then you can cut it low like in my photo and you can also cut out a couple of the thickest, oldest stems to encourage new growth. For Floribundas (clusters of flowers on the stems) then don't cut them so short. Then give them some rose fertiliser. They like a mulch of well rotted manure or compost as well. Pruning and feeding and watering in dry spells will encourage the spindly ones to make more growth.
But I was wondering if the rose in your picture could be "Queen Elizabeth", which is a tall Floribunda and can make 6 - 7 feet tall. If it is, I would prune her to about 2 feet tall. Hybrid teas are generally 2 1/2 feet to 4 feet tall.