Are you able to install this capsule (not the base) with just a lap belt?

Hi Raewyn, thank you for your enquiry, the Britax B Safe can be installed with a lap belt without a base, there are downloadable instructions on the product page and you can find the correct way to install this with a lap belt on pages 24-25. We hope this helps. if you follow the link https://www.babyonthemove.co.nz/store-locations/ this will take you to our online store finder. Here you can find contact details for your nearest Baby On The Move Store where one of our team experts will be happy to assist you in your product search and help answer any further questions you may have.