The lockdown imposed in England in response to the COVID-19 pandemic involved an unprecedented ‘shift to digital’, including in relationships between non-cohabiting individuals. This article examines young people’s perspectives on and experiences of using networked communication technologies (NCTs) in romantic relationships during lockdown, based on 14 focus groups (n = 80) and interviews (n = 38) conducted with young people in England during 2021–2022. Using critical realist theory, we identify interplays between lockdown as a condition, NCT affordances and wider norms, meanings and expectations for relationships. Participants were ambivalent about interacting online during lockdown, with interlocking risks and opportunities specific to and transcending lockdown as a condition. Implications are discussed regarding meanings and experiences of post-digital relationships for young people, both during and post-pandemic.