Iberian chiffchaff? Higher Penwortham, Preston

I went to see the possible Iberian chiffchaff at Higher Penwortham this evening. It's a controversial bird, some say it's Iberian, others say it's just an ordinary chiffchaff with a very odd song. I'm no expert, but I think that the photos fit Iberian, albeit perhaps a rather dull bird. Note especially the yellow in front of the eye. The song is also a pretty good fit, though perhaps not perfect. Put it this way, it might not quite fit Iberian but it's even less like a normal chiffchaff! Atypical Iberian chiffchaff might be the best description! Uploading the recording of the song is proving a challenge. I've managed to put it here but you'll need to be registered with bird forums to access it. Hopefully I'll be able to make it more easily available later tonight.