PB894 went down in the North Sea off Denmark according to this link:
https://aviation-safety.net/wikibase/wiki.php?id=159515
Lancaster PB894 lost North Sea, 50 km. North West Hanstholm, Denmark, 31 Dec 1944.
"Missing on Gardening mission. Took off from RAF East Kirby at 1620 hrs for operations over the Kattegat."
"Intercepted at 2.800 mtrs. and shot down by Hptm. Eduard Schröder (1) of 3./NJG3. The aircraft crashed at 21.00 hrs into the North Sea some 50 km. North West of Hanstholm. "
For ME321:
https://aviation-safety.net/wikibase/wiki.php?id=49319
It says that plane went down at: Vilt, gemeente Berg en Terblijt