Probably the best thing i've seen on Google Street View

More likely it's just because there was a delay between the times the images were taken, hence now you see it now you don't. This is extremely common on Google Maps.

Edit: For example, click the arrow to go down the No Entry road: https://maps.google.com/maps?q=WF17+9LN&hl=en&ll=53.731781,-...

If you look at other details, such as the truck on the other side on the road or the person next to it that are gone as well, you will notice that the pictures were taken at different times.

This might be due to a takedown request (unlikely since they then would have removed the other pictures as well) or just a coincidence.

No, those photos were just taken at different times of day. You'll also notice that if you move forward the truck down the road is gone and the shadow from the tall tree is pointing in another direction.