Lost cat, Saint Helens Close, 2, Portsmouth — female, microchipped brown Tonkinese

She is a three year old brown Tonkinese cat with dark brown points and a brown body. She is not wearing a collar and is microchipped. She went out of a window around midnight on Sat / Sunday. We have a secure garden so she doesnt go out much and usually comes home within a couple of hours; and always when called. All the neighbours have checked their sheds etc in our close of houses.