Vinca sp. Vinca minor variegata. In some places it is considered a thug/invasive. Just hack it back..it will soon re grow. vinca minor variegata - Google Search 1. Vinca minor left .Vinca major right. 2.Vinca major top. Vinca minor bottom.
Can I second Silver surfers comments, it is a thug. This is planted in my next door neighbours garden, or should I say 'now in mine'. It is very invasive and hard to get rid of. I have hacked it back for decades and yet every year, 'there it is again'. Not one I would recommend, a bit like Russian vine it takes over very quickly.