Hi chazza,
I think Honeysuckles would do well there. you should have enoufg space to get two in, so if you plant differant varieties you will get a succession of flowers. Lonicera periclymenum 'belgica' is the early Dutch honeysucle which has fragrant red flowers ,while L P 'Serotina' is the late dutch variety which has purple/red flowers which turn yellow into autumn.
Train them up on canes to get them up to the trellis, they are self supporting and need little attention.
You could maybe grow some bedding plants in front, so you can have a change each year, Buisy Lizzies are very colourful and easy to grow. Good Luck. Tbird+