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LONDON - Prince William's romance with Kate Middleton appears to be heating up, with the pair secretly moving in together at his official residence in London.
Middleton, 25, is believed to have been using Clarence House as her own city pad for the past two months.
Royal sources told the Sun newspaper that while the new living arrangements were "unofficial" at this stage, Middleton was fast becoming "part of the furniture".
"Kate left her job in October and since then has spent the bulk of her time with William in Clarence House when he is in town."
Prince William finished his tank commander course in August.
- AAP