When comparing like-for-like journeys, the e-cargo bike regularly came out as the faster and more economical mode of transport, especially during peak rush hour. A single delivery by bike to a café in Blackheath Village emitted just 4g of CO2 compared to 614g by the van, a 99% decrease. In addition, the journey was over four minutes quicker and cost as little as £1.60, just over half the price of the same journey made by van.
https://www.sustrans.org.uk/news/e-bike-cuts-co2-emissions-london-business