In-person meetings for work, training or education purposes can still take place but only where it is not possible to carry out the activity from home, and if social distancing can be maintained and the venue can demonstrate it has followed COVID-19 guidance. People should only attend a business meeting in person if it is necessary for them to be there - social meetings with work colleagues should not happen. Permitted venues, including exhibition and conference centres, can hire out function and event spaces for essential work, education and training purposes, where these events cannot reasonably be conducted remotely in Step 1 and 2.
I know that there are a lot of outstanding questions regarding the Roadmap  and I’ve been following these up with DCMS today and they themselves are awaiting responses for many of these from the Cabinet Office. The delay is due to the Cabinet Office concentrating on clarifying issues related to the schools reopening on 8th March at the moment so there may be a bit of a delay before all  the tourism-related issues rise to the top. However, I will keep chasing to get answers for you as soon as possible.