Mongo's Hole

I guess there will be many unexpected things that happen during this project. This week, during a stroll around the field with my very good friend Mongo, we found a hole! A new hole. Mongo being Mongo, wanted to investigate. Possibly this is a result of the drying of the field, we haven't had rain of significance for many weeks and there are a lot of cracks from the clay drying out. Could some underground water course have dried so much that it has caved in? We don't know. The hole is only 30-50cm deep but clearly something below that level, has dropped - and we are in mining country! A quick call to the Coal Authority to enquire as to whether I should be concerned , suggested that I should. Given the virus lockdown, they were impressively reactive. I had 4 calls from different people in the space of an afternoon, and tomorrow contractors will be arriving to fence off said hole! They don't mess about these people. I think (hope) they are just being cautio...