Hello,
I think its a Sylvia warbler: you can see the slender, notched tail and I think the undertail-coverts are to short for an Accrocephalus , although I am not sure, this can be judged with confidence.
Bill shape and lenght and slender legs are also better for a Sylvia warbler.
I must admit, that seeing the thumbnail, I thought, this is a clear Accro, but then I realized the pitfall picture because of the following points: errected head and throat feathers together with pale lores and a pale looking bill produces an "Accro-head". Also, upright stand on legs (hope, thats understandable) seems to play a part in this.
But which? For me, its either a Common or a Spectacled. I hope, that someone can reduce the warm colour-cast of this picture (no offense!) and I hope for more pictures and others to jump in.
If I had to put a name on this bird, it gives the impression of a Spectacled with a large bill (but within variation for this species), but I like to be corrected and learn from others.