This would be the engines from Lancaster LM508, which was lost near Werkendam (Netherlands) on 22 June 1944 killing two of its crew (bom aimer F/Sgt. Thomas Handley Duff and tailgunner Sgt. John Edward Keogh). The site was excavated in 2014 due to planned redevelopment of the area. Duff was buried in Werkendam in June 1944. Keogh remained missing until the 2014 recovery, following which he was also buried in Werkendam. The other six crew members parachuted to safety.

The aircraft was a 101 Sq Airborne Cigar aircraft, hence its eight man crew. It was damaged by Flak, and subsequently attacked by a Ju88 nightfighter that finished it off. A monument has been erected near the site, using a propeller. Smaller parts are in a museum in Werkendam. The RAF collected at least two engines and various components for a proposed memorial at or near its home airfield or the 101 Squadron base.

Complete story here: De ondergang van de Lancaster LM508 – BHIC and Monument voor crew van neergestorte Lancaster bij Werkendam onthuld (video) | Werkendam | bd.nl

Your engines may be in the pictures here: Brokstukken neergestorte bommenwerper Werkendam naar de RAF in Engeland gebracht – Omroep Brabant, I think.