Princess Anne’s son has broken up with his girlfriend of three years in shock split. Peter Phillips split up from his girlfriend Lindsay Wallace after dating since 2021. The Princess Royal’s only son began dating his old friend following his divorce from Autumn Kelly. The pair have now separated as their relationship has “ran it’s course,” according to a source in the Sun. There is not believed to be anyone else involved in the split and the pair are still amicable. The source said: “They were friends before their relationship blossomed. But Peter and Lindsay have gone their separate ways as t…