>> HAWK21M, regarding your question about water still getting inside the tent, I suspect that once the tent is in place, there is a large flap that covers the opening in the top of the tent where it fits over the front section of the engine.
This way, the only hole in the top of the tent would be around the engine pylon (as seen in the photo) which is protected from rain because it's under the wing. So, I suspect it probably stays pretty dry inside that thing. Just my thoughts.
Anyway, that's a pretty neat looking tent. I've never seen one before, and it's appropriate that it's being used in England where it rains a lot.
I wonder how often they're used by maintenance crews over here in Canada & the USA?
, that tent would be great to use for camping! Just throw a plastic tarp over the hole in the top ....... and you're all set.