My grandfather was a Navigator with the 8th Air Force’s 36th Bomb Squadron. On 2/5/45, at 0550 hours, he and his crew aboard a B-24J R4-C nicknamed The Uninvited (a/c #42-51239) took off on an operational RCM mission to a destination over the North Sea. The plane was never heard from or seen again. The Missing Air Crew Report (MACR # 12234) indicated that the crew was last seen at take off and believed lost at sea due to icing conditions. I was copied on an email discussion that included the authors of the book Special Op Liberators. In their book, they mentioned the loss of The Uninvited but suggested the possibility the B-24 was shot down by a German night-fighter crew who claimed a victory over unidentified aircraft, possibly from the RAF Coastal Command in the waters between Denmark and Norway. Their theory was based on the general location and the fact that some Liberators were used in the RAF Coastal Command. Their information was gathered from German records that were included in the book Nachtjagd War Diaries by Boiten and Mackenzie, and included the quoted material: “4-5 Feb 1945 Bomber Command dispatched 678 sorties to various targets for the loss of only 5 aircraft. The number of Nachtjagd sorties flown in reaction to these raids is unclear, but 2 Lancs out of a force of 27 bombers mine-laying off Heligoland and in the River Elbe, returned to the UK with severe damage caused by night fighter attacks. The only Nachtjagd success appears to have been against an unidentified aircraft , possibly from RAF Coastal Command, in the waters between Denmark and Norway and one Abschuss was claimed. A morning Reich Luftlagemeldung (Air Situation Report) by OKL FueSt 1c records: ‘Against flights over the Skaggerak - 2JD: 3 aircraft Verolsgungnachtjagd, 1 certain Abschuss. Losses -personnel (killed - missing - wounded): 2-0-0. Flak Successes - Luftgau: 1 certain and 1 probable Abschuss.’” The author that provided the quote later suggested potential RAF Coastal Command Squadrons who may have been operating in the area and day(s) in question. They are the following: 120 Squadron, 206 Squadron, 224 Squadron, and 547 Squadron. He further went on to report the 619 NLS was also in operation during that time. I’m trying to determine if there were any RAF losses that could be attributed to the shoot-down claim in the Naghtjagd War Diaries. If anyone has access to records that could provide an answer to that question or could direct me to potential sources I would greatly appreciate it.