In recent decades, global food trade has liberalised substantially. Britain imports 47 per cent of its food, 19 per cent coming from outside the European Union.[1] This means that, no matter the time of year, most products can be sourced from somewhere in the world.
Read the case for food liberalisation in full here.
[1] Department for Environment Food & Rural Affairs, Food Statistics in your pocket: Global and UK supply, 2019, 9 December 2019, www.gov.uk/government/publications/food-statistics-pocketbook/food-statistics-in-your-pocket-global-and-uk-supply, (accessed 3 February 2020).