At last

Earlier this month, I was bemoaning my lack of ability in getting to grips with one of the many (thousands?) of Yellow-browed Warblers in the country.
Today I eventually managed it and, as the books all say, it gave itself away with its call as it flitted about some scrubby willows in Kenidjack Valley. 
Just to prove it, I recorded the call on my phone and this is the spectogram. I am sure you will all be able to work out the sound from this!
Happy days.