Tiger Woods -- Back in the Swing

We're told Tiger had a team of security around him as he hit balls. Helicopters started flying over the area and Tiger beat a hasty retreat.

Tiger's kids are at the house with the nanny. Elin Nordegren showed up with her sister earlier in the day.

As we first reported, a Tiger employee told us Tiger would play at Tavistock ... a PGA sponsored tourney in March.

We should know a lot more about Tiger's golf plans -- and the Masters -- on Friday.