TAMPA, Fla. — The British government is funding a group of in-orbit servicing ventures to help develop ground rules for their planned rendezvous and proximity operations (RPO). The British subsidiaries of Japan-based Astroscale, Switzerland’s ClearSpace, and D-Orbit of Italy said Dec. 23 they jointly secured 690,000 British pounds ($869,000) from the U.K. Department for Science, Innovation and Technology for an initial “regulatory sandbox” phase. “The total value is relatively small but I think it has the potential to really have a big, big impact on how the market develops for…