Tamara Ecclestone has given birth to her second child with husband Jay Rutland.The 35 year old welcomed a baby girl named Serena in a hospital in Switzerland, her billionaire dad Bernie revealed.Tamara and her husband Jay, 39, are already parents to a six year old daughter named Sophia. Formula 1 boss Bernie, 89, announced the news as he admitted he is "thrilled" to welcome a new grandchild.