Calum Rhys chose to forgo the use of English subtitles to translate the German soldier, in favour of focussing on the actor's actions and emotions to convey the dialogue instead, thus placing the audience in the shoes of the British soldier.
Despite the limited budget, director Calum Rhys favoured employing the use of practical effects over VFX, including live pyrotechnics, to evoke a more visceral and authentic feel to the film. Whilst VFX is still utilised, it's minimal in comparison to Calum's first war short film, Our Father (2015), which he found the abundant use of to be too off-putting.
Five months prior to commencing principal photography, director Calum Rhys and production assistant Morgan Rhys both visited Ypres to undertake research on the Battle of Passchendaele, much of which made it into the final film.
Although set in Belgium, the film was shot entirely in England, with the barn scenes filmed in Worcester, and the trench and no man's land battle sequence filmed in Ipswich.