Heliplane Love the previous post!
With the shot at the end showing some damage to the engine cowl, he must have taken out part of the fence with his prop. That'll be expensive.
To have caused that damage to the cowling the post would have certainly hit the prop and the leading edge. The damage looks like fretting from the cowl vibrating. Looking at the vid our heroic Biggles was well clear of the posts.
The interesting point is why was that obstacle sunbathing on short finals?
In summary it's the airport/councils fault for letting numpties wander about in an airway. Do people sleep on motorways in that country? Biggles is in the clear and performed his emergency short field landing well.