The interior of the new £37m Causeway Distillery, which opened at The Old Bushmills Distillery in 2023. Turnover at the Bushmills distillery fell last year as new accounts for the Co Antrim Irish whiskey-maker point to scaled back production of new spirit in 2024. The £53.96 million generated by the Old Bushmills Distillery was 55 down on 2023, million signalling some the challenges Irish spirit producers have experienced in 2025. The Old Bushmills Distillery in Co Antrim. Bushmills’ production capability was significantly increased in 2023 following the opening of the new £37m Causeway Distillery, which more than doubled its production capacity.