How did it get there ?? (Maybe a bit woo)

[Sofacat]

I noticed that the side of my house was wet and water was dripping from the overflow pipe . I went into the loft , lifted the lid that covers the water tank and a piece of balsa wood about 15” x 4” x1” was sitting on top of the ball cock and stopping the water flow from being cut off.

Obviously I removed it and water has stopped dripping from the overflow.

But how on earth did it get there . The tank was completely covered by the lid and the wood didn’t appear to have been in there too long as only bits of it were soggy.

Any ideas ?

Stuck to the underneath of the lid and fell off?

When I say ‘lid’ I mean a soft insulated blanket type thing which was completely covering the tank . The wood couldn’t have been stuck to it .

I don’t believe in ghosts but I’d love to know how the wood got into the tank.