The Bank of England published Staff Working Paper No. 1,189, which examines how Covid-19 travel restrictions affected goods trade across borders. Using a gravity framework with internal trade flows to separate border effects from broader pandemic demand and supply shocks, the paper finds that travel restrictions acted like a classic border friction that materially raised the cost of cross-border trade. A full border closure reduced bilateral trade by around 19% for a typical country pair and implied an approximate 23% hit to global trade in 2020 Q2. The estimated impact was highly uneven across countries and transport channels. Trade losses were larger for geographically proximate partners, with the paper estimating a hit of about 37% for the closest country pair and about 8% for the most distant. Road and air trade were significantly disrupted, while seaborne and rail trade were not. The interaction between distance and transport exposure explains why some countries were able to close borders at a lower trade cost than others. The paper also finds no evidence of long-run scarring, with trade rebounding strongly and temporarily overshooting once restrictions were eased.