Hurrah for our polytunnel! Sometime during the gusty winds last night, the bird table — replete with pointy bits including the spiky finial — fell onto the far end of the tunnel. Rather than ripping through, it simply left a small dent where it skidded along the surface and came to rest held up by it.
I have now dropped a large lump of concrete on the base of the bird feeder, which should be enough to anchor it and we may put a bit of repair tape on the tunnel as a precautionary measure. However, we find ourselves very impressed with its proven strength.