I watched Time Team when it was on in the US. It was maddening how their shows were limited by time. They’d get a glimpse that maybe something happened in an area but they only had 24 or 48 hours to find something before they had to give up the search.
I liked the history and enthusiasm, but hated the artificial time limit.
I believe in most of the digs they did, once the 3 days was up, local groups/organizations took over and continued the work.