Yellow Wagtail's behind school

Today me and my brother went behind the Kings Langley school to look at what could be seen. The main thing to be seen were the Yellow Wagtail's unfortunately whilst I was taking pictures of the Yellow Wagtail's my brother spotted a Lesser Whitethroat by the time I had arrived back to were my brother was it had already left. This was quite annoying as this would have been a new bird on my year and life list. But in exchange for not seeing the Lesser Whitethroat I was able to get some OK pictures.