Hi, Neil,
Great advice from Laura, pegging the runner will encourage rooting and once runners have rooted you can cut back to suit where you want the plant to be and like she said, shearing it back will make it bushier. Just a quick word of warning, depending how favourable the conditions are in your garden, Vince major can become invasive, choking out nearby plants, etc. It seems to me that people's opinions of it are similar to that of Marmite - you either love it or you hate it. Personally, I think it is a great ground cover as long as you are prepared to keep up with it.
All the best.
Kathy C.
Replied: Monday 22nd of June 2009 10:04 PM