Marsh Harrier - Marloes Mere

The Marsh Harrier(below), is in the log book at the hide, as seen earlier in the week, an arrival date would be nice if anyone goes to the hide & can provide the info. Thanks.
(For the records, 1st recorded 12/10, if same bird. From log book)

Highlights from Dale area ,
A Marsh Harrier at Marloes Mere this am, & a Lesser Whitethroat & 3 Chiffchaffs in Dale.
Further birds at Marloes Mere;-
c100 Teal, c10 Shoveler, c40 Wigeon, c30 Snipe, & 2 Swallow.
Marloes village;-
12 Swallow, c30 Coal Tits, & 1 Chiffchaff.
(Paul G. & Gary H.)