NHER 13527 (Monument record) - Fritton Lake or Decoy

Only half in Norfolk.
Originally a medieval peat working, converted to decoy after flooding by addition of 'pipes'.
The eastern extension, Lound Run, not included, is a modern reservoir. See (S1).
The depth of this lake has meant that virtually none of its area has become overgrown.
Possibly used as seaplane base in World War One.
Museum on site has parts of two P 47 Thunderbolts which crashed in lake during World War Two.
(S2) gives a description of how the lake was used for training during World War Two, with an anti seaplane cable across it. Tanks were swum across the water; one tank remains at the bottom of the lake. A concrete chamber exists nearby.
E. Rose (NLA), 29 April 1992.

(S3) notes that the decoy was 'prodigiously large' but the tunnels were placed on plain ground rather than under cover, which he thought silly.
E.Rose (NLA), 4 February 2003.

July 2006. Norfolk NMP.
A series of wooden jetties and floating structures and platforms are visible on the Lake in March 1944. These structures would have been associated with the military training exercises that took place on the Lake. These structures have not been mapped. A possible launching area for military crafts has also been recorded on the northern shore of the lake, within Belton Common Wood, see NHER 43356 for details.
S. Massey (NMP), 18 July 2006.