Rose Collared Parakeet

Glanced out at my feeders one morning last week to see this looking back at me. A Rose Collared Parakeet. I know they are commonw in and about London and into the suburbs but have never heard of any round here. I live in Blofield Heath. Have you had any other reports. Don't think it is an escapee as it was very wary and I couldn't see any identity rings. I took the picture through double glazing so quality not too good. Glad I did because as soon as I quietly opened the door it streaked away. Roger Edgell